Malicious PDF — malware analysis report

Static analysis result for SHA-256 697539eeb87d9102…

MALICIOUS

PDF

36.2 KB Created: 2020-08-26 02:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2969488047b993e542ffe96ae27bd1e4 SHA-1: b8cdb427eb83a631e7a6514bd80e9c2b15471526 SHA-256: 697539eeb87d9102df75af2c18b85c41925a68f275f90b83d7cbe0e892c31fb9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'router keygen 2016'. The presence of numerous external PDF links, many pointing to benign Shopify URLs, suggests a link farm or SEO poisoning tactic to increase visibility for the malicious redirector. No scripts were extracted, but the overall structure and malicious URL indicate a phishing or malware distribution attempt.

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/pify?keyword=router+keygen+2016
    • http://files.kennethbuzo.com/uploads/1/3/1/4/131453034/251696.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/blog_website_template_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/jojebozatuzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/60385696193.pdf
    • https://cdn.shopify.com/s/files/1/0433/6700/6364/files/mixatusujubabefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/lukozinizitukokinak.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/ruxagajowek.pdf
    • https://cdn.shopify.com/s/files/1/0438/2271/0941/files/96175179889.pdf
    • https://cdn.shopify.com/s/files/1/0434/9765/2376/files/devenir_famille_d_accueil_chien_guide.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_off000050b6.bin
0d5a6905ba68e711671a00e3ffdbfb4f06aae3596ef88eaa6f51c938b9ee39a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50B6 5088 bytes
font_01_sfnt_off00006235.bin
eb9961ccdf20153bae757dd4096484849e34b5ce0d64c3ea66e1186f10c42710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6235 10192 bytes

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