Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf12ba3623521537…

MALICIOUS

PDF

52.1 KB Created: 2020-08-12 23:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00f5328a0b90bfdbe6580a216d10c559 SHA-1: 230f2e79ac7f8bf5fe519e122bb39865dce95b8d SHA-256: bf12ba3623521537c82b5d7b8b900b51e374e732814dc1e96e0158cbfea16694
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=cancer+de+base+de+lengua+pdf', suggesting a lure related to a medical topic. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy 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/pify?keyword=cancer+de+base+de+lengua+pdf
    • http://files.cornishquest.org/uploads/1/3/0/7/130739039/xileriralomi-finotarofiginek-gixesife.pdf
    • http://files.bigpineysincredibulls.com/uploads/1/3/0/9/130969763/kewusuw_kaderamolisizav_posidaxuvaxek.pdf
    • http://votatos.yellowstoneartboutique.co.uk/uploads/1/3/1/4/131482995/zepadoba.pdf
    • http://files.hamradioworks.org/uploads/1/3/2/6/132696174/6179500.pdf
    • http://files.bensonneighbors.com/uploads/1/3/2/6/132683328/738537.pdf
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/83514240315.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/31665411505.pdf
    • https://cdn.shopify.com/s/files/1/0435/5116/2517/files/monitorar_rede_wi_fi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4079/2999/files/python_threading_example.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/gujuvile.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/poserejoniwitelikako.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pezudatilekubad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4992/files/bolakaxanowagaratepaxek.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2852/files/18126308406.pdf
    • https://cdn.shopify.com/s/files/1/0454/5180/4824/files/austin_kleon_roube_como_um_artista.pdf
    • https://cdn.shopify.com/s/files/1/0437/8689/5522/files/basics_of_resistors_capacitors_and_inductors.pdf
    • https://cdn.shopify.com/s/files/1/0428/9606/4671/files/tegimonagidoxunaxawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5491/3943/files/xinimupegusidobijaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/bezoxodulililodelejezo.pdf
    • https://cdn.shopify.com/s/files/1/0447/2219/2537/files/approximation_questions_for_ibps.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_off000089f2.bin
787b4fbeb6444374a214fe7362ddde9bd043097f473539ed83e37828e91891dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x89F2 5368 bytes
font_01_sfnt_off00009c3a.bin
fda57ca365ae841490730e86d31fad74a7aa41e4ce3192ef861016c5b8ebdce0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3A 11496 bytes