Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed607e09496a4d40…

MALICIOUS

PDF

44.9 KB Created: 2020-08-03 07:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1919cbee90ca71bbf6ac50bdb04604e SHA-1: ec602a2f3229e4d31705796c7ec33b979ddcbf5f SHA-256: ed607e09496a4d40e602d1435b17b793325ecfb7ae092c8411a0bd566efb68dd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Addends T1059.001 PowerShell

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to manipulate search engine results or distribute content broadly. The primary malicious URL is https://ttraff.cc/pify?keyword=universal+paperclips+save, which likely serves as a gateway to further malicious content.

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.cc/pify?keyword=universal+paperclips+save
    • http://files.robbfreemethodisthistoricalcentre.com/uploads/1/3/0/7/130739204/034d11.pdf
    • http://files.historyneedsyou.com/uploads/1/3/0/8/130873851/waruxaj_megubefof_nepimib_vozuwaz.pdf
    • http://wozaluzim.chicagosanon.org/uploads/1/3/1/0/131070374/borazu.pdf
    • http://files.deathpartyuk.com/uploads/1/3/1/8/131871721/5d008b661f.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/divurupiwatuxekamad.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1968/files/kukofuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0167/files/dolenadam.pdf
    • https://cdn.shopify.com/s/files/1/0437/6595/6759/files/goosebumps_complete.pdf
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/45552243032.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/durovozibemunavotufim.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/dizuwiruka.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/dimosazojevezalewax.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/26918573630.pdf
    • https://cdn.shopify.com/s/files/1/0430/3290/3829/files/59292711544.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c97.bin
d0c8c95a098951c891effbeedfa0f24dc7427fe8d88451c0e58d5377fd254d06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C97 4576 bytes
font_01_sfnt_off00006c20.bin
9a1cca4b160a8501626597da46e5a24bfeda1a26c3f4abd6771f166186e46637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C20 14256 bytes
font_02_sfnt_off000098b7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98B7 4324 bytes

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