Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e71bf60b346d62…

MALICIOUS

PDF

52.7 KB Created: 2020-08-07 08:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 436d582219f87836ac228c804d8fc8e3 SHA-1: 86633b308c8760823e319a225b1fb4942c63ac72 SHA-256: 61e71bf60b346d6282b13803b3bc930cad2b0970badc8c875dac316cb5e6ceae
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://ttraff.ru/pify?keyword=deleuze+difference+and+repetition+pdf, is identified as a malicious redirector. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=deleuze+difference+and+repetition+pdf
    • http://pidosak.logansyndrome.com/uploads/1/3/1/4/131408738/mowojekaxotag_fesawofi.pdf
    • http://files.amaranthusestate.com/uploads/1/3/0/7/130740190/638ad91dc29.pdf
    • http://files.realmofricketts.com/uploads/1/3/1/6/131636683/vedivuxujaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/6991/5814/files/pekodedexorilovo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/87561544214.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/dojabopaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/5912249449.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/9275523635.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/nurifobigedaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1580/files/16168169607.pdf
    • https://cdn.shopify.com/s/files/1/0430/9683/4212/files/56698098330.pdf
    • https://cdn.shopify.com/s/files/1/0439/6787/3182/files/monstrous_compendium_forgotten_realms.pdf
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/67248149463.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000842d.bin
cd2cae0a58839ccaceccab363d1c83260da4e1b07adc927482c11232313574c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x842D 4900 bytes
font_01_sfnt_off000094e6.bin
cd091212fcec0ed8a3c0b9c970b2867941d5fd93b5045c804f0028e3b4308cdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x94E6 10284 bytes
font_02_sfnt_off0000b7d2.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7D2 4324 bytes