Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5f0050118ed990…

MALICIOUS

PDF

42.7 KB Created: 2020-08-05 00:21:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f219e28a593d4c99ce352959a9131751 SHA-1: b3f8b727309ec906d743fd4b4807b6b59b1b8c5e SHA-256: fb5f0050118ed990d632fa7e7ef668eb87332fc214168c3e7ed7777a611ce2be
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to phishing or malware sites. The document also hosts a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=laporan+pendahuluan+hernia+umbilikalis+pdf
    • http://files.championcamp.net/uploads/1/3/2/7/132741433/tegogikadep.pdf
    • http://files.galefalcongreenequine.com/uploads/1/3/0/9/130969634/kovexiregunalole.pdf
    • http://files.casselssportscomplex.com/uploads/1/3/1/8/131856112/jojikesewofok.pdf
    • http://files.makejaxweird.com/uploads/1/3/2/6/132681501/2805230.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7296/files/pinovateroxudozoxanal.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/xisabilafokunodo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/nuroguxukukirawewib.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/21295152816.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/zafonijiboxeminadoves.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9383/files/arduino_uno_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/7995/7669/files/xutoxalubifajimanaxov.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/linufodalafirupegumu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9265/4745/files/xegufugevi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/97873622328.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006821.bin
3f6e87e87474e1e98f3bf92b81c3edf95cbe63396d29d4cde63d4a052daf36f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6821 5424 bytes
font_01_sfnt_off00007a65.bin
9ea777b7facfc4315ec86e0926af3d1dc5dbc09900f6fa52d42c399783f421d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A65 10480 bytes