Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cc05e825d4f2d4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-13 22:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7767e95ac1245af01c1890837ef4589a SHA-1: 2b9d81d70d1684b77bc660d1fd4e4a3e94e8b058 SHA-256: a5cc05e825d4f2d46b701db3eb6a89e32ad3e9719c0512acbf3f2f07be975a37
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=asean+certificate+of+origin+form+d, which is likely the primary lure. The presence of numerous other links to Shopify domains, as flagged by PDF_SEO_LINK_FARM, suggests an attempt to disguise the malicious intent through a large number of seemingly benign links.

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=asean+certificate+of+origin+form+d
    • http://files.principledrywall.com/uploads/1/3/2/7/132741194/lidozisizet_moseb_jabaxo_rewugufixaguraw.pdf
    • http://files.edwardftravers.com/uploads/1/3/0/8/130873945/diwoxolasejirew-zaxevumeromilip.pdf
    • http://files.indianacentralnews.com/uploads/1/3/2/8/132814050/e5f330.pdf
    • http://files.zeinabaltagi.com/uploads/1/3/0/7/130775342/a0c997c17097.pdf
    • http://files.hairbypearl.com/uploads/1/3/2/7/132712000/98b40b7.pdf
    • https://cdn.shopify.com/s/files/1/0434/2530/0647/files/bouillon_de_poulet_pour_l_me_des_ado.pdf
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/cargador_solar_para_celular.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/discord_chat_formatting.pdf
    • https://cdn.shopify.com/s/files/1/0437/7500/0730/files/brown_eyed_girl_guitar_chords.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/anita_baker_rapture_songbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3775/files/365_days_of_wonder.pdf
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/18476680928.pdf
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/44945453874.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/47313309269.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/40175233667.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065f3.bin
859ecf58cdb91f275c2e28817df9c253ffd5edb62edf1e63650f32a59db8ebfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F3 5300 bytes
font_01_sfnt_off000077d4.bin
468b4f3891f1a351df52a30ea7a078030588d8c374f36765371f92e28cb19bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77D4 10384 bytes

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