Malicious PDF — malware analysis report

Static analysis result for SHA-256 6001d4347005711b…

MALICIOUS

PDF

44.7 KB Created: 2020-07-24 11:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f0c221545a681beeb32c062b36ad8e2 SHA-1: ea8c400927618e0f6777b197df68a02935cfc0f5 SHA-256: 6001d4347005711b8de5a78a59a64d06d542063deb70b50483146607aa049a2d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document masquerades as a useful template to entice users to click these links, which is a common social engineering tactic. The ML classifier strongly indicated maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of links to known malicious infrastructure.

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.com/pify?keyword=cornell+notes+template+for+google+docs
    • http://files.valleyliberator.com/uploads/1/3/1/6/131606035/padavosagog.pdf
    • http://files.thecarluccishow.com/uploads/1/3/1/8/131856257/wezubutapexunab-vuxitegaponed-miwosapofukefoj-dokexekoj.pdf
    • http://files.lymanproductions.com/uploads/1/3/0/9/130969004/171232.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/75805722182.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/62981243029.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/78017466591.pdf
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/98901111741.pdf
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/lusisugur.pdf
    • https://cdn.shopify.com/s/files/1/0438/1786/1277/files/nisemegatogaxomowazegez.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/zuwofofobon.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/risumamaduzozivovijaba.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/lejomalojatutotokuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/87433451021.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070c9.bin
b62550efa3079a562b4a3cb39ccb42a25c053a9cd2c254278f1932b9a15c05b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x70C9 5236 bytes
font_01_sfnt_off0000827b.bin
f4477828e85ee118db574667e568340bad88cb36c2d55e9d193dd22a2cd5091f
pdf-font-stream PDF embedded font (sfnt) at offset 0x827B 10328 bytes