Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ede42cb7bcd616…

MALICIOUS

PDF

48.8 KB Created: 2020-08-14 14:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10df9b165f5b6915d1df469e978b1063 SHA-1: c78ed73908b73c739fea014a0536766529aea0e2 SHA-256: 42ede42cb7bcd616db65b52359834554f269324deea7e9c35170507f6b11d0a0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=introduce+yourself+presentation+template'. The document body, though heavily obfuscated, also contains this URL and references a 'presentation template', suggesting a lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious redirector. No scripts were extracted, but the primary attack pattern is the redirection to malicious infrastructure.

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=introduce+yourself+presentation+template
    • http://files.niallkinsella.com/uploads/1/3/1/4/131453713/vaboj_serewifujuzepo.pdf
    • http://jokevav.rockyflatshistory.org/uploads/1/3/0/8/130814297/7b6d232599884.pdf
    • http://bifez.appliedmicronanolab.com/uploads/1/3/1/6/131636725/5d5f49c5.pdf
    • http://files.womenwithapurposemin.com/uploads/1/3/1/6/131637257/pugewidelisulafeduda.pdf
    • http://files.fccfrankfort.org/uploads/1/3/0/8/130813866/ripalujeku.pdf
    • https://cdn.shopify.com/s/files/1/0435/0109/3030/files/zusivavusujedewesatimap.pdf
    • https://cdn.shopify.com/s/files/1/0429/9928/3861/files/sql_server_2020_licensing_datasheet._microsoft.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/zibudupibonal.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/church_of_christ_bible_study_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/magizijarawidewave.pdf
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/varicose_veins_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/4914/7803/files/bujinalelal.pdf
    • https://cdn.shopify.com/s/files/1/0440/2616/7461/files/angular_documentation_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1311/files/how_to_update_r.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/96664421599.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/17275786895.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008014.bin
ff62bb8d5a74350507a4a2e8f7d1e4028a6c23679096a10ab9b088c39c55ddc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8014 5340 bytes
font_01_sfnt_off0000922e.bin
31a8c80c2055d21291c8ddf31b9c417eac2561b5292130ea7a93bc5eaefbd43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x922E 10668 bytes

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