Malicious PDF — malware analysis report

Static analysis result for SHA-256 00affbbab1db5145…

MALICIOUS

PDF

52.4 KB Created: 2020-08-14 06:37:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24afbe8bf9ce7800ef44eb854f14575 SHA-1: c426930d9bced020409f05f9c42a66887f8ef49c SHA-256: 00affbbab1db5145f89ee55211d8c95384cf87fb422c6d97f4b03b3ab4c18192
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF contains numerous embedded links, identified as a link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=gastrocnemius+muscle+flap+pdf', is directly linked to malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=gastrocnemius+muscle+flap+pdf
    • http://borazi.chrisball-student.com/uploads/1/3/2/6/132695569/musuzutexetiji-nukozatesita-zezovejotunot.pdf
    • http://files.conductorbeverlytaylor.com/uploads/1/3/2/6/132682142/pinalijiso.pdf
    • http://files.practicejoynola.com/uploads/1/3/0/9/130969190/367d81767c3.pdf
    • http://files.juiceboxventures.com/uploads/1/3/1/6/131637853/juvifexefodupar.pdf
    • http://files.cccinspire.com/uploads/1/3/1/4/131438538/dodixeju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8699/5863/files/55077971476.pdf
    • https://cdn.shopify.com/s/files/1/0440/7423/8102/files/natejen.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2666/files/rolitezalojixogujuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/blendtec_blender_recipe_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/lutapoxololoziv.pdf
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/portable_app_editor.pdf
    • https://cdn.shopify.com/s/files/1/0434/7900/7398/files/51901108747.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/rijasulifigawunobe.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/filter_array_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/sorejokoraridig.pdf
    • https://cdn.shopify.com/s/files/1/0431/9926/6979/files/23159653257.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/xodukixaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/57121739140.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/dutapepal.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008c1d.bin
ed19c832537a92631ffbcdee68fcff743bdc4260726260becea9c3ab596849a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C1D 5332 bytes
font_01_sfnt_off00009e25.bin
86aa37514fec882d420025caa315cfe6c4553700088c370e15866dfe5edccbda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E25 11672 bytes

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