Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d235e000463633…

MALICIOUS

PDF

50.7 KB Created: 2020-10-15 12:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ff482f6ea25227f6831e6e37449e065b SHA-1: f824a8239b0c9f9fda7bb672479415fd77b91052 SHA-256: b5d235e000463633f79ad4b7dc7756741b2c54a1ad34bc8177367c7fe855f222
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector. The heuristic firings indicate that this PDF is part of a link farm designed to direct users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://ttraff.club/pify?keyword=conjugation+of+er+verbs+in+french+worksheets In PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/domijedaxixak.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/kezedivalo-bolumukejufufik.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/f5d445.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/7512832.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/69ef0218457a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f8718f7e5c82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f86f43d9d918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f87a3f62086b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f873aa2cc611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5f87535882ef1.pdfIn PDF document text
    • https://site-1036981.mozfiles.com/files/1036981/28124495435.pdfIn PDF document text
    • https://site-1039390.mozfiles.com/files/1039390/94838362453.pdfIn PDF document text
    • https://site-1040354.mozfiles.com/files/1040354/tevokodiwopere.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/puviza.pdfIn PDF document text
    • https://site-1039173.mozfiles.com/files/1039173/82285936634.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6019/9069/files/netumisidivokuxolejaludad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7273/7446/files/francis_francis_x1_coffee_machine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8826/8449/files/plantronics_wo1_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0459/4846/files/tohru_dragon_maid_costume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/sotajefoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8793/6150/files/arcade_games_apk_pure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3974/2369/files/gavizatexanetiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9650/6521/files/xperia_x_performance_android_pie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9194/3331/files/kolezazulenizilotezitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15276ac1-4e16-432f-a9e8-bd7f3408154a/25739130813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa2eb92d-d9be-490d-b773-d9249bacb088/tuxenijaxudobedes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12bafa67-f429-4b9c-a94e-4f589bd38e08/bobutatenubomax.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F8 5448 bytes
SHA-256: 4dc694a377fda45ca675d982a73da27ce5476fd62a77d32e7e76cca999dea6b4
font_01_sfnt_off00008aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA1 10432 bytes
SHA-256: b343e3dcc3f37faf156d253ff077013b1079ced9d2393c29d878e29d27540cbb
font_02_sfnt_off0000ae00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE00 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176