Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c87f6c98a69699e…

MALICIOUS

PDF

50.5 KB Created: 2020-09-22 03:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb8e2e7ee823b9addaf7628ce72fdb22 SHA-1: c00b2e9c8fdea70f7abc7ac7014b08319b30f324 SHA-256: 0c87f6c98a69699ea678358bb343d79c4fbc7bd9153684f8e5e62d85b5562ed4
154 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links, many of which point to external PDF files. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.club'. The document body, though heavily corrupted, contains fragments of URLs and text that suggest a lure related to online wishes or services. The presence of a malicious redirector URL and the sheer volume of external links indicate a likely attempt to lead users to malicious sites or engage in SEO manipulation for malicious purposes.

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.club/wix?keyword=is+real+wishes+com+really+does+it+work
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/0879/2475/files/terex_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/hms_housing_uf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/mariage_d_amour_clayderman.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/xidufiwukigevoza.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/ensayo_argumentativo_ejemplos.pdf
    • https://583325bd-55ea-441e-91eb-fc549ca826d8.filesusr.com/ugd/856cea_1e1dd81163cd4389a1fd1efcb3cb544f.pdf?index=true
    • https://f235fdc8-aca2-4282-9eff-bcc8159af96a.filesusr.com/ugd/b1277d_be9783060741462ebb97ac0534635ccd.pdf?index=true
    • https://10370a0b-4180-4f11-b215-ffae90c0ae1e.filesusr.com/ugd/b54ff4_8ae50af29c6f4f189a2e878f961e66a3.pdf?index=true
    • https://cac533ac-8be8-4159-b9dc-1d1b8e9fb616.filesusr.com/ugd/89c6ad_dd5ef52ae9724d928f9ec7fea720a090.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/advertising_media_definition.pdf
    • https://cdn.shopify.com/s/files/1/0459/2772/7271/files/59417220399.pdf
    • https://cdn.shopify.com/s/files/1/0433/4072/6427/files/divi_mobile_menu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0458/3318/files/90386269578.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/peliculas_de_antonio_aguilar_complet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/57561051926.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/36108415118.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_off00007a22.bin
c394b0fbd23be9c35712756058286351fbfbe96fd548b6a266003eee83d0e94c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A22 5056 bytes
font_01_sfnt_off00008b5a.bin
531f509e217d3c13dcea11c8ce59584736a500b82b426a2e736c7601f056f766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5A 10428 bytes
font_02_sfnt_off0000aeef.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEF 4324 bytes

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