Malicious PDF — malware analysis report

Static analysis result for SHA-256 711a9c8cc4450948…

MALICIOUS

PDF

44.7 KB Created: 2020-08-26 16:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9acea3cb45f58e14bc8d022e42a2d366 SHA-1: c96d627176f03cde4b73373f0e20280046f29e10 SHA-256: 711a9c8cc44509484a8f6f5e148cae654757dacddbbdad7e26bae219466ad8ef
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to malicious redirector infrastructure, specifically the URL https://ttraff.com/pify?keyword=scythe+by+neal+shusterman. It also exhibits characteristics of a link farm, embedding numerous external PDF links, many of which point to Shopify domains. The ML classifier strongly indicates maliciousness. While no scripts were extracted, the embedded URLs and the PDF structure suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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=scythe+by+neal+shusterman
    • http://files.pollyadamssutton.com/uploads/1/3/0/7/130776054/290a8b03816bc57.pdf
    • http://files.gwionraven.com/uploads/1/3/0/7/130739776/4916943.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5056/4773/files/economics_online_course_answers.pdf
    • https://cdn.shopify.com/s/files/1/0462/4374/1845/files/kozubepedunaponebuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/livro_budismo_moderno.pdf
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/96975457113.pdf
    • https://cdn.shopify.com/s/files/1/0433/9138/5758/files/jurnal_isoterm_adsorpsi_freundlich.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9157/files/95842265515.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6327/files/db_2013_pg_22557-_22559.pdf
    • https://cdn.shopify.com/s/files/1/0448/9651/8299/files/sevuwuzegeto.pdf
    • https://cdn.shopify.com/s/files/1/0428/7548/6367/files/81993451390.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/64008021348.pdf
    • https://cdn.shopify.com/s/files/1/0429/8801/1673/files/34903980539.pdf
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/33503394109.pdf
    • https://cdn.shopify.com/s/files/1/0428/7997/5591/files/pizegudex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ea.bin
666995e91ff317275f5762709b12faf6a499fddacbe40f0e994778cdc8445b40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EA 5108 bytes
font_01_sfnt_off00007612.bin
3d7c0b3f33e00e391784ebcc85335b402ae35809d0b65fa4df0ad1c37c2a57e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7612 9944 bytes
font_02_sfnt_off0000981a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x981A 4324 bytes

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