Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99d02d978d7a261…

MALICIOUS

PDF

136.6 KB Created: 2020-08-13 22:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1b1c8e3290ae0daae472e4c1d165768 SHA-1: 155190c810c4c6f7f3d5f2ed2a956bc4b945f2d5 SHA-256: b99d02d978d7a2619a59c90ec9cc9732aae5cee81772838351a3809fa0fd227e
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=ap+module+grade+10+3rd+quarter+pdf. The document body, though heavily obfuscated, contains references to educational material, likely a lure. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=ap+module+grade+10+3rd+quarter+pdf
    • http://files.alabamaemsconference.com/uploads/1/3/1/4/131454151/1153316.pdf
    • http://megarew.zimmermanvideoproductions.com/uploads/1/3/0/8/130814229/34e56bc8622.pdf
    • http://files.tinablanck.com/uploads/1/3/0/7/130739744/luvebututipe-nokulemeku.pdf
    • http://files.scholacincinnati.org/uploads/1/3/2/6/132681836/wapikafijuje_powoked_vijalorozoxo_metawukub.pdf
    • https://cdn.shopify.com/s/files/1/0437/6579/2929/files/67457108333.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/85305047306.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/rebem.pdf
    • https://cdn.shopify.com/s/files/1/0432/4553/5400/files/bromatologia_libro.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/cardiomyopathy_classification.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9046/files/new_mercedes_a_class_brochure_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/bevumisufatuwadi.pdf
    • https://cdn.shopify.com/s/files/1/0436/5864/1573/files/exercices_loi_binomiale_1ere_s.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/jumbled_sentences_worksheets_for_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0437/8198/0317/files/gexirasolal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/20463386009.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/97613645060.pdf
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/xasumosuvekodega.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b071.bin
44478926eb8d9de0d15f772b74780aff57bdac07481435f5c791018ef64e3a7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B071 5880 bytes
font_01_sfnt_off0001c199.bin
085a6537fd79292a2bb63f9b517d91e8a9d9f4af2bcec3d6d210c6dcec92fd2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C199 5656 bytes
font_02_sfnt_off0001d4bf.bin
22becd934ee9c3bee73be1032d116e98d650ca5c520c53ebc5c089a85ede7f25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4BF 12272 bytes
font_03_sfnt_off0001fdda.bin
8864390a932a87a1fbd4ec6a8baf5665054711a76358821ef52947caf3e06d05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FDDA 16232 bytes

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