Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d435e0c512d7922…

MALICIOUS

PDF

42.2 KB Created: 2020-08-13 22:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc209acde788716d4a20c511af226307 SHA-1: add43e7739ea50ce6f4939889845bc91f9bf7962 SHA-256: 6d435e0c512d79222f40c1aa3e7c8ef2c0043a4cfc9cc4e3371bdd9efc1bcdb5
154 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'Battlenet stuck at initializing' error, directing users to a malicious redirector. It also functions as a link farm, hosting numerous PDFs on Shopify and other domains, likely for SEO manipulation or to spread further malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=battlenet++stuck+at+initializing
    • http://files.christophervonspitzer.com/uploads/1/3/2/6/132682585/xivusapizumi.pdf
    • http://files.layflatrepair.com/uploads/1/3/1/0/131070485/tibuzovup-purebamoxevujin.pdf
    • http://files.spanishrecipeswithsofia.com/uploads/1/3/2/6/132683400/6715647.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pejolezogumulugadajo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3538/4225/files/jemipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/16087772656.pdf
    • https://cdn.shopify.com/s/files/1/0437/4354/3447/files/78426350763.pdf
    • https://cdn.shopify.com/s/files/1/0435/8363/5619/files/omission_of_articles_rules.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/72682785285.pdf
    • https://cdn.shopify.com/s/files/1/0430/5305/6149/files/28673793300.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1220/files/adversus_mathematicos.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/16274913779.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/74113395685.pdf
    • https://cdn.shopify.com/s/files/1/0435/2173/6859/files/12743275713.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9686/files/the_art_of_storytelling_john_walsh.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_off000066d1.bin
d3f6001aa2c2a8308424b7b86e6e7646e8286a371dd3e925d35cdfacd3be6af8
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D1 5032 bytes
font_01_sfnt_off0000780f.bin
56cb09134123a99208209005a63bd405e86d3a57593f6a9e83744f868d369765
pdf-font-stream PDF embedded font (sfnt) at offset 0x780F 10536 bytes