Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce86cc199e9fea9d…

MALICIOUS

PDF

40.1 KB Created: 2020-08-07 14:39:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb69512ff904b196e0fe44d8631fecd3 SHA-1: 1911b070871ed8d29f6f47eccbc1355004803691 SHA-256: ce86cc199e9fea9d4c5c5e5465e83c2534119013c783fcbcbf3eb5d25649308a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=standard+employment+contract+pdf'. This URL is presented within the document body, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=standard+employment+contract+pdf
    • http://mofokit.pchelpnsupport.com/uploads/1/3/1/4/131453598/goxareke-debuliziso-favej.pdf
    • http://files.hongkong-entertainment-production.com/uploads/1/3/0/7/130738975/0c46992a8.pdf
    • http://files.moonlightfire.net/uploads/1/3/1/8/131871744/f953b9c6047b.pdf
    • http://doxoxajer.iimunc.com/uploads/1/3/1/6/131607600/8691344.pdf
    • https://cdn.shopify.com/s/files/1/0427/7587/1654/files/lojafuxodud.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/complex_analysis_stein.pdf
    • https://cdn.shopify.com/s/files/1/0429/1254/6975/files/cmos_vlsi_design_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/mastering_elliott_wave_principle_constance_brown.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/mimelajenenaxavamokokine.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/pinedexif.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/53750599829.pdf
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/les_noms_des_animaux_en_francais_et_en_arabe.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/
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/les_noms_des_animaux

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f78.bin
1aa37c12aac4018d8baa37c7e0a052f54359cb5109d159469636b8bfafc18722		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 5328 bytes
font_01_sfnt_off0000718d.bin
879210deabbe8fdccca533b43eed22239041ebfe5f58743af35a86bb47b85034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x718D 9812 bytes

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