Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fce38793fa23831…

MALICIOUS

PDF

44.5 KB Created: 2020-08-23 12:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f650c1ec3e696b6b4a396f0e231069 SHA-1: e2cfdee2ca01b0881cfc5386a79ea7907e9fd7de SHA-256: 5fce38793fa238310cbac134691976bb33101d81afbb335f309c7a8130cb5910
162 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to a link farm hosted on Shopify, and one critical link to a known malicious redirector at 'ttraff.ru'. This suggests the document is designed to funnel users to malicious sites, likely for phishing or malware distribution. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/pify?keyword=play+store++karna+hai+please
    • http://files.americancampexperience.com/uploads/1/3/1/3/131381151/wonokimuga.pdf
    • http://files.dfaustino.com/uploads/1/3/1/6/131607321/2502152.pdf
    • http://files.americanfoursquare.us/uploads/1/3/2/7/132740218/majibomavapakabopi.pdf
    • http://magenawon.momentumlifecoach.org/uploads/1/3/1/4/131437254/tagom.pdf
    • http://files.cmameetup.org/uploads/1/3/1/3/131383228/linixifalanatim_rawof_xafemunepa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/68930856160.pdf
    • https://cdn.shopify.com/s/files/1/0433/6841/5400/files/99963858359.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/17105669970.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/dark_souls_2_sotfs_cheat_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/2599/7722/files/mtgo_server_status.pdf
    • https://cdn.shopify.com/s/files/1/0434/3080/5669/files/63975810047.pdf
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/silver_surfer_the_animated_series.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/sevubafokivupebenife.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/gonofogofamilawisosudif.pdf
    • https://cdn.shopify.com/s/files/1/0436/0772/0094/files/60032344823.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4629/files/4th_edition_d_d.pdf
    • https://cdn.shopify.com/s/files/1/0437/7296/9109/files/kirishima_x_reader_lemon.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006434.bin
e0e0a55cf031871d21c075b591f73c6e3b3fe47d2a6580f71c7346ed0a9576f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6434 4864 bytes
font_01_sfnt_off000074ab.bin
0754fd80e5a5248ad772d0d51d4ad4a4f0c853ece4b161c30f1bdd160e8bd51e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AB 9980 bytes
font_02_sfnt_off000096e1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E1 4324 bytes

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