Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b8564a77654987…

MALICIOUS

PDF

43.1 KB Created: 2020-08-19 04:58:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00bc4583ad668111084346e4bfa03d72 SHA-1: 2dfb326681d04ac1c3b42c7a9d861604777b3bc0 SHA-256: 78b8564a7765498704427c3433adbffc15737afcb062c71506493868d45d7c68
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to generate SEO traffic. One prominent link, 'https://ttraff.ru/pify?keyword=free+fire+game++karne+ke+liye', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely as part of a phishing or scam campaign.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=free+fire+game++karne+ke+liye
    • http://files.ahmedal-azzawi.net/uploads/1/3/2/7/132740186/todeg-fuzibivigujekan-jorifirataz.pdf
    • http://files.gbyws.org/uploads/1/3/1/4/131483019/paludizixi-pazibokadelok-xovubonavegazuz-nobuxudisapefod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/xogiximavewupofawaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/bootable_pendrive_cmd_steps.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/banking_wikipedia.pdf
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/listado_de_alimentos_alcalinos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/mastercam_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0430/1714/2433/files/71556144665.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0326/files/40882728523.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/dipujat.pdf
    • https://cdn.shopify.com/s/files/1/0431/8186/7176/files/gisidabezuboxof.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/
    • https://cdn.shopify.com/s/files/1/0428/5664/47
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c90.bin
2d886bdd76c869157cc186db8080eee44cd662f39f01ef1372786c92750a95da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C90 5032 bytes
font_01_sfnt_off00007dab.bin
493a8b7e0ae71aaa6c14db1057e04a7229dc7fba9f33f024d0a92535908618d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAB 10060 bytes

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