Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb1d9cb74743527…

MALICIOUS

PDF

69.3 KB Created: 2020-08-20 18:17:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08db13c08c1be55300261225ee8166c1 SHA-1: bc272b821ac76f64e563fae05ebc5ca21e074a90 SHA-256: 0cb1d9cb74743527a05a56c02f75d35e6a92a5e6107c8dfd85f0897124a624c6
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. One such link, https://ttraff.ru/pify?keyword=dervish+guide+grim+dawn, is flagged as malicious. The presence of a link farm suggests an attempt to obscure the final malicious destination and potentially engage in SEO poisoning to lure victims. No scripts were extracted, but the structure indicates a malicious document likely intended for phishing or malware delivery.

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=dervish+guide+grim+dawn
    • http://rumutik.behindthebittack.com/uploads/1/3/1/1/131163658/nodasifilizuk_damunogupamego_fefagulipaxu.pdf
    • http://titadided.adossdesigns.com/uploads/1/3/1/4/131453114/34840.pdf
    • http://files.wicr.org/uploads/1/3/2/6/132683040/1924102.pdf
    • http://jarewuveg.shodacars.com/uploads/1/3/1/8/131857315/826986.pdf
    • http://files.draftingsuppliesatjeffersongalleries.com/uploads/1/3/0/9/130969356/6796439.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/agrochemical_association_of_kenya.pdf
    • https://cdn.shopify.com/s/files/1/0430/3575/4650/files/rezoxil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4496/files/xapamon.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/jabaxikokas.pdf
    • https://cdn.shopify.com/s/files/1/0437/7437/8138/files/wuwivodesusezunigizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86372263330.pdf
    • https://cdn.shopify.com/s/files/1/0438/4056/9494/files/11000303495.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/74024438044.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/duvufebikupixanotuduwid.pdf
    • https://cdn.shopify.com/s/files/1/0438/6222/9157/files/symbolic_math_matlab.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_off0000c588.bin
dc7b02d5de669c9d3ce8df1a518e58073cacd384e2d14cb02de3dd4d695a7e9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC588 5052 bytes
font_01_sfnt_off0000d695.bin
7c08fe484c7ecd848205219610e8a841e0482f5d148ad56549b251a530edc053		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD695 10456 bytes
font_02_sfnt_off0000fa13.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 4324 bytes

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