Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c2f14869593a6a…

MALICIOUS

PDF

41.0 KB Created: 2020-08-14 03:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b171dd6d06b0b79ab47cf624ec699799 SHA-1: 21d6d12dc6dcc80b998a36778567f477c5da8323 SHA-256: 49c2f14869593a6afa49b1b233b13312394ad17ac22e414048363efa90c68af6
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'tax file declaration form pdf 2016' and includes the malicious URL, suggesting a phishing lure. The presence of a link farm further indicates an attempt to distribute malicious content.

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/wb?keyword=tax%20file%20declaration%20form%20pdf%202016
    • http://files.elliewakeman.com/uploads/1/3/1/1/131164504/gomosinibusuk_fevewud_nefapafibi.pdf
    • http://files.leedokyun.com/uploads/1/3/2/7/132712093/kakebe_sojiwag_kemuxaruno_wunafuwilegud.pdf
    • http://files.claireallenviolin.com/uploads/1/3/2/6/132681891/dukexadixe.pdf
    • http://files.novelideasbylaura.com/uploads/1/3/1/1/131163898/merefazonofurof.pdf
    • https://cdn.shopify.com/s/files/1/0431/3700/7778/files/94032475927.pdf
    • https://cdn.shopify.com/s/files/1/0432/2295/8248/files/albanesische_studien.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/nefufuxikivosepabub.pdf
    • https://cdn.shopify.com/s/files/1/0428/4183/3635/files/dopajekakopeboje.pdf
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/zilaxivawovas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikas.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5185/files/mibufovonasowufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/64841579392.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/jikazezenazevafuvobemipa.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/geometrical_isomerism_in_oximes_and_alicyclic_compounds.pdf
    • https://cdn.shopify.com/s/files/1/0434/1579/7917/files/80598154569.pdf
    • https://cdn.shopify.com/s/files/1/0433/9721/8460/files/20994820661.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/conjunctions_worksheet_for_class_4.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_off00005fa3.bin
a18028986096a92bedbebbd442b1a00557fa6f6c6f78c10c80c8f026837cc72c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA3 5620 bytes
font_01_sfnt_off000072b4.bin
bcb73246e271dc05a45836b073ecd8be2ae2d04b27f18119cca501a3863cff4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B4 10848 bytes