Malicious PDF — malware analysis report

Static analysis result for SHA-256 696a2c3e0801f5e1…

MALICIOUS

PDF

36.3 KB Created: 2020-08-24 13:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd8465307b03e4173f66180320505713 SHA-1: f731b51e6d3bc4b530a750dadc42b85f3a3b20cf SHA-256: 696a2c3e0801f5e1fb91990ae595ce59ecb005ab7f98d027d8972d752dc9c0dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous Shopify-hosted PDFs, with one primary link redirecting to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the PDF was flagged for linking to known malicious redirectors. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure.

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=marvel+avengers+alliance+redux+alpha+5
    • http://files.seanbeaudoin.com/uploads/1/3/0/8/130815213/1017829.pdf
    • http://redom.ipksportsbetting.com/uploads/1/3/1/8/131857252/xulubafude_fowiwu_sowelorujigeb_kamagigo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6160/6550/files/punavudewadaxozegarikutob.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/34945464334.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mipubafuminidumef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdf
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/distributive_property_algebra_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/2076/3804/files/sipebori.pdf
    • https://cdn.shopify.com/s/files/1/0438/6357/2635/files/ririxigazuzajulejivesupo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7331/5740/files/86602782623.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/disney_blockbusters_flute_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/chowka_kannada_full_movie_hd.pdf
    • https://cdn.shopify.com/s/files/1/0429/5062/3385/files/perimeter_and_area_worksheets_grade_9.pdf
    • https://cdn.shopify.com/s/files/1/0438/3650/6272/files/pokemon_x_and_y_pokedex_book.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_off00004f3f.bin
62c26495a9fdb803c367a6b4527965b7cb9225319c29df924a8b3d1e4b242c8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F3F 5592 bytes
font_01_sfnt_off0000624c.bin
af8803d3efcd4b94afbba35b57df9d1320a421288e2f7a749bfe6ab03a663a05
pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 9888 bytes