Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff91925239b21e1…

MALICIOUS

PDF

44.2 KB Created: 2020-09-01 15:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68cdabb4df702db08bbe1f350220bc1e SHA-1: aa9996ea4e4adefdd8367bd9066e9c65bec1f2bb SHA-256: 0ff91925239b21e17a2f6f070b1d2649936ce1ec3c9e85aa41f67d0d1590cabc
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically a URL related to downloading drivers. The document body also contains this URL, suggesting an attempt to trick users into clicking it. The presence of numerous other PDF links, many pointing to Shopify, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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/wix?keyword=beats+audio+driver+hp+envy
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/9339/2536/files/dipupipopitof.pdf
    • https://cdn.shopify.com/s/files/1/0435/8039/1585/files/70201496744.pdf
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/95303647089.pdf
    • https://cdn.shopify.com/s/files/1/0438/9090/1144/files/ballistic_ecks_vs_sever_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0461/1325/9683/files/60116605245.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/kenujokuro.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/bloody_mary_morning_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/excel_vlookup_user_guide.pdf
    • https://static.usrfiles.com/ugd/ab059d_b59684ebe9194d96b19e0aeb3af3d464.pdf
    • https://static.usrfiles.com/ugd/cf79db_5e8722d1084843fdbafa43ace13fa8f2.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1651/files/xilavigoda.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/26992872211.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/49039295579.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/81612604155.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tagesagebog.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_off00006b13.bin
536b3a070ed266eec859ef1de0b9c90f73ce5e7761e9296bf0b7aae9458597d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B13 5228 bytes
font_01_sfnt_off00007ce2.bin
087e2cb51afa77fc1c37b5f367476f4295be67ab0d0ff5217d870deceb678403
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE2 12512 bytes