Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed10b8897f9f9c62…

MALICIOUS

PDF

40.1 KB Created: 2020-08-31 12:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22872454352bce30c09d89acaccedc85 SHA-1: b044ddfa0270129cedc248fab2a9210df652ccca SHA-256: ed10b8897f9f9c62e27cf786524012c68072adc748a0217281967b94a43786f1
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to a known malicious redirector. The document body and embedded URLs reveal a link farm strategy, with the primary malicious URL being https://ttraff.ru/wix?keyword=new+lisa+ann+porn. This suggests the PDF is used to lure users to malicious sites, 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.ru/wix?keyword=new+lisa+ann+porn
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/85865922236.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/easeus_data_recovery_9.9_cdigo_de_l.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3204/files/epdm_gasket_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/range_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0429/1048/2588/files/weralenerarer.pdf
    • https://static.usrfiles.com/ugd/5ed537_487604974f3b4ee0bd65185bddc0cb37.pdf
    • https://static.usrfiles.com/ugd/0a0016_c8b3b5b1ba7a4dcab64381691fb7c867.pdf
    • https://static.usrfiles.com/ugd/5926b4_5ed0548b07814c34be14eec5fef42740.pdf
    • https://static.usrfiles.com/ugd/b13fd1_8eb5a51f0d564f3792f8da4abbe3ad4f.pdf
    • https://static.usrfiles.com/ugd/cafc24_c1a152786ec249f4a4bd68963e8b492f.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_off000059fa.bin
7a91ac7c6ad51ba872e97b2c688b47db58d611582977423cb77cf3169d9a3c10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59FA 4876 bytes
font_01_sfnt_off00006aad.bin
9ecaed3f5052357b23e81329d2d566c091dda3e56760ce38234ca03e388bfcd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAD 12888 bytes

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