Malicious PDF — malware analysis report

Static analysis result for SHA-256 066118bce23bf816…

MALICIOUS

PDF

34.9 KB Created: 2020-08-26 04:33:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 673a14246e8169d9d3af5db702c5cf65 SHA-1: d1e95097316b91c1906c65811fa446e02f93e7d5 SHA-256: 066118bce23bf8160ba240ff46c287faf95e4da3356516089c8bf924e13a7375
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with text related to game mechanics. It also hosts a large number of external PDF links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the embedded URL heuristic confirms the presence of a suspicious link.

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=combat+magicka+regen+skyrim
    • http://files.atowncenter.org/uploads/1/3/1/3/131380000/2608399.pdf
    • http://buximu.josezayasdirector.com/uploads/1/3/2/6/132695569/5927961.pdf
    • http://fedemu.nordiclilly.com/uploads/1/3/2/7/132740324/xiferibadozirelabej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4193/7818/files/badowiwozazizedukol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86593634255.pdf
    • https://cdn.shopify.com/s/files/1/0434/3896/4903/files/lojupoduva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23342697578.pdf
    • https://cdn.shopify.com/s/files/1/0435/0204/3288/files/xekarixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/riputakumajido.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6110/files/chirru_kannada_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/xowiwevolajezuvakidilaz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2511/1972/files/59447034747.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_off00004a51.bin
f486a8e79dc2aa38989747ea8994c271a7d975a10c27276907108d451c6dbbd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A51 5300 bytes
font_01_sfnt_off00005c4b.bin
47c66579d0b24805f3668e7470bd684d932d0f873b80fe3e3724ea385ee2aa19
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4B 10204 bytes