Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af726f96a484d6c…

MALICIOUS

PDF

42.6 KB Created: 2020-08-30 01:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2844aaacea0fc5844e60b89e4afeea3d SHA-1: b16ffb4f91fecab632ac631cb79a44186da5a125 SHA-256: 2af726f96a484d6c5af49d104cb51a5efe888106dfc8c6bf6086ce0faaf0c8d8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for '11 day diet free download'. This indicates a phishing or scam attempt. The ML classifier strongly supports the malicious verdict. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious URL is the primary indicator of compromise.

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=11+day+diet+free+download
    • https://static.usrfiles.com/ugd/912de2_25f3ad26558a4b178dfc9e46667073db.pdf
    • https://static.usrfiles.com/ugd/2e79a6_811aaeb1015b406d8eadb85557c050f6.pdf
    • https://static.usrfiles.com/ugd/38bf1f_da8b29fcd63941c8bcc5ecd25abc335a.pdf
    • https://static.usrfiles.com/ugd/b8c837_095032e327c045eeacb4e03c60e8771d.pdf
    • https://static.usrfiles.com/ugd/b8c837_6abd73b545414893bd8f5d5b3e9c24cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_39835e4bb17e4edfab816511a3ef0091.pdf
    • https://static.usrfiles.com/ugd/f459ea_b3e953552b7b4b6b9564410c6fcf3340.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8247b8008014c66982ddd0acc608df6.pdf
    • https://static.usrfiles.com/ugd/de65f7_598c42fb65644e6abc574783089c74c8.pdf
    • https://static.usrfiles.com/ugd/87a178_0eb7128e4e1c489e9e0c3400b464b614.pdf
    • https://static.usrfiles.com/ugd/b8c837_283fb3897a294bedabd8e8dd2706be84.pdf
    • https://static.usrfiles.com/ugd/2e79a6_f132371ffeb24e74bae931922f90e90d.pdf
    • https://static.usrfiles.com/ugd/856cea_7ac4df176fe8408394108b4ac0e9a668.pdf
    • https://cdn.shopify.com/s/files/1/0432/9196/7652/files/70450257914.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/pigiweleguwojitetavesamiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5181/8903/files/14075305528.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_off00006934.bin
307dc266f32a22c8390eb4ab6b22afc1f7eb256cf6e75d75e35629b0be8f6013
pdf-font-stream PDF embedded font (sfnt) at offset 0x6934 4872 bytes
font_01_sfnt_off000079f5.bin
cc43e16a5aad0347d9ee175ec7c00e8f25fd71cc8222526bebeeafe84905ba5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x79F5 10308 bytes