Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d61347b7412b33a…

MALICIOUS

PDF

75.3 KB Created: 2020-10-15 04:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: b060e60d7cf98735d1c5e75e8c9663a4 SHA-1: 099a2e16dcb573a27f5f33829b9ee51b18f83d3f SHA-256: 2d61347b7412b33a69f82ab3aeaae9c1289583640957bd99c550e3809f371ba4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, including a known malicious redirector. The embedded content suggests a lure for a wallpaper creator tool, which is likely a pretext to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of many PDF links points to a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/pify?keyword=3d+name+wallpaper+creator+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8759a1c2f3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365642/normal_5f874bd1a75ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f879be59cc1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f876f3111f42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8738fac3097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f87a3798363b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f872db4ae0b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f87029b8ab44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5f87708480440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f877c1fb48d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f871e1092c51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f879e4cde90f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f87486973a2e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c515ff-e830-4c83-8878-568482057de1/95332097551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4542d097-c0dc-4f06-a631-57907fbbef7d/82903810981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d1a1869-59e6-4b16-bc29-d915b8a1c772/sivumazofumifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c8a8606-69cd-4cca-8f72-7e1f1be0228c/18075685754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9950642-79ab-4e07-82b3-532ea43ad713/51349302149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7578/7157/files/lekimolexodutelalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/3896/6438/files/puruxab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5794/6530/files/oster_blender_jar_walmart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3173/4683/files/sketchup_quick_reference_card_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/kinematics_physics_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/48205505091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1028/4456/files/scrap_metal_3.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C64 7072 bytes
SHA-256: ec16b29a8206a90805e960b1806f4ea9c94e130c2dd76e5601ec423bf9bfa01d
font_01_sfnt_off0000ae5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5D 3064 bytes
SHA-256: 0b5e2232e287906fa69f7cdc51ab19c8c92147b2e4fba8c5edcc65ed17d50ef2
font_02_sfnt_off0000b928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB928 5264 bytes
SHA-256: de48d34f5d8e1914dacea1eb949c940fa0990bb0191a3548c86ccebc9380f658
font_03_sfnt_off0000caf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF4 5904 bytes
SHA-256: 4defae324d33cbf64740c465075821cf9fc2439db636a30cdc631d445a34109a
font_04_sfnt_off0000dfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD7 10748 bytes
SHA-256: a691e4b1b02fda8ff148bb5ecceb0e0825392735e21479ca34f699f3f605c0ae
font_05_sfnt_off00010493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10493 17956 bytes
SHA-256: d70fc40fd6a5283237506c3fa48d63d48c7927de22953246d8d08a8506627b3d

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