Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bc501e41c522a3…

MALICIOUS

PDF

41.3 KB Created: 2020-08-25 23:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0ed66689012249142b49d7967b99461 SHA-1: bb0912670c181930a69bf1f33fa4fd9f0119c909 SHA-256: b9bc501e41c522a395ab6756dac51c1eb47e0563d565abc005b06fdd90e35eff
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. This URL is embedded within the document body and also appears in the list of extracted URLs. The document also exhibits characteristics of a link farm, with numerous embedded links, many of which point to Shopify domains hosting other PDFs. The primary malicious link redirects to 'https://ttraff.cc/pify?keyword=the+best+type+of+exercise', indicating a likely phishing or malware distribution attempt.

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.cc/pify?keyword=the+best+type+of+exercise
    • http://files.stgscentreleeds.co.uk/uploads/1/3/0/8/130874038/gawutalaremixopelon.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0245/files/44043837480.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/wesov.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/adobe_after_effects_free_trial_windows.pdf
    • https://cdn.shopify.com/s/files/1/0436/6116/4697/files/discord_embed_link_in_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8234/files/modele_attestation_d_hebergement.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1068/files/mijuboxujazore.pdf
    • https://cdn.shopify.com/s/files/1/0430/3942/4665/files/achy_breaky_heart_ukulele.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/91808827636.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/tagafofopapovenelolixejun.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/76330337448.pdf
    • https://cdn.shopify.com/s/files/1/0437/3685/8775/files/biblia_ilustrada.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2535/files/approaches_to_qualitative_research_in_mathematics_education.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/alexandre_o_grande_biografia.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_off000064f9.bin
b58d7f37a6fb5a6b588c4ffed162772f29b58e6b5f8c8856d83caf60e2b19e47
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F9 5120 bytes
font_01_sfnt_off0000766e.bin
5bd1ff83057d527f7e706244e4c7243a7460c19027e7c7ea1755d1a1f7a57b68
pdf-font-stream PDF embedded font (sfnt) at offset 0x766E 10024 bytes