Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5eae02bf7dc048…

MALICIOUS

PDF

36.4 KB Created: 2020-08-07 20:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0738e40b1238c858754651e22ea95d27 SHA-1: 4666cc01a9f3dc346d006709fed85f22d36e5c1a SHA-256: be5eae02bf7dc0481bf4d1d54ccb23c3ad1843862b743b57dea1bf031f86d375
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a link to a Bhagavad Gita PDF. The document also contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=bhagavad+gita+yatharoop+pdf+kannada
    • http://files.familyfirstinflatables.com/uploads/1/3/1/4/131452949/d359c596.pdf
    • http://files.nexgentestosterone.com/uploads/1/3/2/7/132710763/tevodijamijepe.pdf
    • http://files.mountainschoolalumni.org/uploads/1/3/2/6/132683017/japipaxunexe.pdf
    • http://files.mrseppenbach.com/uploads/1/3/1/1/131163734/6416fc87318f5c6.pdf
    • http://files.buyinbr.com/uploads/1/3/1/0/131070161/90042b.pdf
    • https://cdn.shopify.com/s/files/1/0440/4156/8421/files/88103602231.pdf
    • https://cdn.shopify.com/s/files/1/0450/5042/9598/files/convert_mp4_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/romimogawopawopuxuta.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/fapok.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/10821362036.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/calendario_escolar_2020_y_2020_sep_190_dias.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/85418735806.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/durga_saptashati_gujarati.pdf
    • https://cdn.shopify.com/s/files/1/0428/6716/3302/files/wamomuwerazoji.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/technical_interview_questions_for_ece_freshers_with_answers_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/fuxutevuxoduvodef.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4297/files/10151745003.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004624.bin
a96f7acd1e4ca72126ee709cab420bf6583bd706539bddef05bb751aae01991f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4624 5036 bytes
font_01_sfnt_off0000574a.bin
127ae29e1d4a80700cce7cf8832e7441056cfdd99d61539ba5560ee69560d330
pdf-font-stream PDF embedded font (sfnt) at offset 0x574A 9148 bytes
font_02_sfnt_off00007681.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x7681 4324 bytes