Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5d23809f6699a2…

MALICIOUS

PDF

44.8 KB Created: 2020-08-24 07:39:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 498da5268bd0eac14ed2be10372adae6 SHA-1: c28d469a684231ac0b307a0a730ebebf2dd406cd SHA-256: 5d5d23809f6699a28f5fd414a913d8463ee4e18f487d4e1108f7e678d1e58b0f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one identified as a malicious redirector pointing to 'https://ttraff.ru/pify?keyword=guided+math+groups+3rd+grade'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious sites. The presence of a large number of external links, many pointing to Shopify domains hosting PDF files, indicates a link farm or SEO manipulation tactic, likely to obscure the malicious redirector.

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=guided+math+groups+3rd+grade
    • http://kolup.stuarts2gabon.com/uploads/1/3/0/9/130969060/fonekutaduv-nudarujol.pdf
    • http://files.louisemoss.com/uploads/1/3/1/3/131382470/ab50128145ea.pdf
    • http://xakow.washingtoncountylivestock.org/uploads/1/3/0/8/130873738/sazetudagum_fesupilosol_resotobekiv.pdf
    • http://files.hermanus-festivals.com/uploads/1/3/0/9/130970004/842bb774068.pdf
    • http://zejalut.hylandgroup.com/uploads/1/3/0/8/130874493/69eef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/biotina_bula.pdf
    • https://cdn.shopify.com/s/files/1/0437/2591/4277/files/fuxavolegowutomejuvudetix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/wimibukujokoluvixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/lorap.pdf
    • https://cdn.shopify.com/s/files/1/0458/0881/2198/files/acrylic_sheet_dealers_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0436/4668/1248/files/honeywell_thermostat_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0439/0522/0776/files/cancer_pulmonar_epidemiologia.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/58091462577.pdf
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/vopevimixomidoze.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_off00006fa3.bin
e813e90806d279856b9c020c28f803e7ddf60db92128305c95c8f80e96125688
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA3 5536 bytes
font_01_sfnt_off0000824d.bin
9e26a36235059267675545addf70439266e4d0542d4205ce35bcc96f9204eff1
pdf-font-stream PDF embedded font (sfnt) at offset 0x824D 10480 bytes