Malicious PDF — malware analysis report

Static analysis result for SHA-256 6871292675fc6421…

MALICIOUS

PDF

44.7 KB Created: 2020-09-05 22:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 735cb850438a80bf4bea78282cd0df66 SHA-1: 500dfd330b927b05ba740cce46a75ec93726e72f SHA-256: 6871292675fc642194615ed5b3204e475a8a450056c51bc2cbe7e48d9727c614
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one prominent link pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, includes text related to 'best boot manager android' and the malicious URL, suggesting a lure for a phishing or scam attempt. The presence of many external PDF links, including benign ones, indicates a link farm strategy, likely to obscure the malicious redirector.

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.me/wix?keyword=best+boot+manager+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/fifupagokemetupor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0465/3989/9039/files/write_your_story_francesca_battistelli_free.pdf
    • https://static.usrfiles.com/ugd/529385_24b671e72a68468d9a808d728647dece.pdf
    • https://static.usrfiles.com/ugd/db93e9_736737984dd141d29bd65d0de32d0bee.pdf
    • https://static.usrfiles.com/ugd/7e84b7_69f8f91685ab49ca872939dc01fe10be.pdf
    • https://static.usrfiles.com/ugd/b8c837_c91a8d6cd1764ee89fb98ba89efd4be0.pdf
    • https://static.usrfiles.com/ugd/6a4619_d855b885e18b4b38b628f604f545733e.pdf
    • https://static.usrfiles.com/ugd/804ff6_e8fd280d25474ab381cd0aa824f5e770.pdf
    • https://static.usrfiles.com/ugd/2ca22b_29870b123e824c57bdb7ea8710a06cb5.pdf
    • https://static.usrfiles.com/ugd/e2c250_c7c025210ac945ffb77266d6d3585a38.pdf
    • https://static.usrfiles.com/ugd/1c90dc_e892ad545b14428aa84d6b4868409241.pdf
    • https://static.usrfiles.com/ugd/6c032c_77e5740f57dd4d4b94f37b0cf4ec7813.pdf
    • https://static.usrfiles.com/ugd/7a13df_5591c3cde28440a6865fbc2c3d08480e.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_off000071ba.bin
9a0c19912f49d348bb02064c9b48a275ea5bfc56485c6b81febeabb8095b3b1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x71BA 5300 bytes
font_01_sfnt_off0000839f.bin
44366744f62e53b4eadeb09ab38ab437a44c244a85451cd3711595db738a0071
pdf-font-stream PDF embedded font (sfnt) at offset 0x839F 10128 bytes