Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f926bd1e883eb33…

MALICIOUS

PDF

42.0 KB Created: 2020-08-22 11:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf66c9067eb4ead7b0ae5820a1e8adfc SHA-1: d8e8e5a4c0ab4636270056acdc8fef35d635d790 SHA-256: 1f926bd1e883eb33e3170425b94c5ef404c9f819b7e1ed2b9c4f69f1168f3899
150 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'ttraff.com'. The document body, though partially corrupted, includes the same URL, suggesting a deliberate attempt to trick the user into visiting it. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=funny+riddles+with+answers+in+tamil
    • http://files.angelinekimkyna.com/uploads/1/3/1/8/131871835/8577438fbd038.pdf
    • http://files.bbhames.com/uploads/1/3/0/8/130874676/7541741.pdf
    • http://files.synchrodollard.com/uploads/1/3/1/8/131872285/soxibomiv.pdf
    • http://jemilu.lightonthedesert.org/uploads/1/3/2/7/132712116/fovorekumo.pdf
    • http://rawozeref.debbieyoung.co.uk/uploads/1/3/1/4/131406798/8193974.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0450/files/information_about_beniapukur_police_station.pdf
    • https://cdn.shopify.com/s/files/1/0431/1298/8821/files/wefulofomugofolidozag.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/puwudofove.pdf
    • https://cdn.shopify.com/s/files/1/0432/1158/7752/files/besulatudejevote.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/78828380171.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nosisuzamozozi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/wild_n_out_full_episodes_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0269/1743/files/ansiedad_social_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0439/9074/5246/files/liquor_ammonia_msds.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/kibevomobezilitufi.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_off0000662d.bin
0d5f3e5e19e42d5b6ac30285d94508747d0d9a3bbe2edf6f1c53da9a1adc41a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 5212 bytes
font_01_sfnt_off000077cd.bin
cb871ae3658bea54bb1d9f88e8260ea4d701a8fe1f46e4af3acb6496f3d052fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CD 10352 bytes

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