Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b63572a90f322e…

MALICIOUS

PDF

53.1 KB Created: 2020-07-31 11:55:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfc328b060d22fbef831d77d5f0a4140 SHA-1: 337502ad51d0e4cbd2a3113a0be88aeddc7d9461 SHA-256: 35b63572a90f322ee1e83e5a6a6ae181a16b67243f627ad891f320fead78c203
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating a malicious redirector link to 'ttraff.com'. This suggests the document is designed to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector attack pattern.

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=ce2020+municipal+solid+waste+management+notes+pdf
    • http://files.bslfourthward.com/uploads/1/3/0/7/130739163/purupafunevima.pdf
    • http://files.cookingtogetherwithfriends.com/uploads/1/3/0/7/130775126/vapiwokiluw-wikalalurus-bepopufa-pikesanavizizi.pdf
    • http://files.lawn-rite.com/uploads/1/3/1/0/131070579/xigan.pdf
    • http://files.robpedley.co.uk/uploads/1/3/1/8/131856672/regejedeseweneji.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/51086938482.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/9931381522.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2248/files/vegosigibo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/gatovos.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2606/files/74936833072.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/regovezole.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4865/files/92376217407.pdf
    • https://cdn.shopify.com/s/files/1/0428/7964/7900/files/47344800585.pdf
    • https://cdn.shopify.com/s/files/1/0439/4264/1832/files/45506046740.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/10368390070.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/30517424149.pdf
    • https://cdn.shopify.com/s/files/1/0433/8781/4044/files/jifakigixitokotanakux.pdf
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/tojuxovunivapewiwikulet.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/
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/gatovo

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008610.bin
967a2de989c07c609c039bb5d7cfd9d9d38b7e38d67e33cac7f96cbd2611e4c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8610 5648 bytes
font_01_sfnt_off00009943.bin
5fae75ebdfc0d97a843013af84ecc3c167a6b8d16676b030d91553df76c8a6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9943 15036 bytes

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