Malicious PDF — malware analysis report

Static analysis result for SHA-256 062416d671d24054…

MALICIOUS

PDF

41.6 KB Created: 2020-08-17 08:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5753d7802690f511b10a24cee8184f9b SHA-1: cb9f8f00a28b5d6107d145b65ef382c0cce30079 SHA-256: 062416d671d24054ba48819c36e16fb2a84b849ba510941f8e6fd32820920cc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body and heuristics indicate a link farm strategy, likely to obscure malicious destinations or for SEO manipulation. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it's designed to redirect users to harmful 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.com/pify?keyword=builderall+website+templates
    • http://files.tandooripalaceoxfordstreet.com.au/uploads/1/3/0/9/130969700/mexafalizidul.pdf
    • http://files.primocelloceramics.com/uploads/1/3/1/4/131408415/e122f68.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/kuvalusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7329/0908/files/34378330729.pdf
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/99664724848.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/angry_emoji_text.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/bubuzetedigobosivafosul.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/arduino_programming_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/7449/4369/files/72965406635.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/81435202893.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3526/files/fixafivupilewolebudin.pdf
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/lord_byron_biography.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/43190140305.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006393.bin
6894ebe4febae3f01e211d564734258df654fdd7882308e3226b5a96182caf33
pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 5384 bytes
font_01_sfnt_off000075cd.bin
823aaf69ed62e9a0b2bb3cd2cb34d6362bcd442c634c6c53df2fdf203c8eaf51
pdf-font-stream PDF embedded font (sfnt) at offset 0x75CD 10504 bytes