Malicious PDF — malware analysis report

Static analysis result for SHA-256 15844c6133924914…

MALICIOUS

PDF

33.6 KB Created: 2020-08-31 07:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efbed19386f391f6c62f44adbc50bfb6 SHA-1: 63192fc0e5148dd486e7c075409b522899872acc SHA-256: 15844c6133924914c01e26bcf577b749302e683e87a4a4dc7506befb3ceea25b
154 Risk Score

Malware Insights

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

This PDF document contains a link disguised as an "mp3 download" which redirects to a known malicious infrastructure. The document also hosts a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly indicate an attempt to lead the user to malicious content, likely as part of a phishing or malware distribution scheme.

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=jaden+again+mp3+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/97493d_9f16290e00be43088a1d0286715d68b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b4e67165c1340dc9c99ea615bc83a72.pdf
    • https://static.usrfiles.com/ugd/73f3b0_7f0cfd00a9bf463f89cfca2031e39c55.pdf
    • https://static.usrfiles.com/ugd/b8c837_4912825f01514350b65ddd54cb9076a2.pdf
    • https://static.usrfiles.com/ugd/5b604d_343b39be6ff04ef68cf5c7dd9c00df2a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3afb62630ef040858cd9bfdcd2fbf346.pdf
    • https://static.usrfiles.com/ugd/c1615c_02daeb5713094f229a88dcf58f540e8e.pdf
    • https://static.usrfiles.com/ugd/07625c_716a686122f8450491f353f0b5cf84b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_838b1f6d921a45f588b90eeb6c1afaef.pdf
    • https://static.usrfiles.com/ugd/05900a_e57d49ac20074a8da7f5ebf25f5305dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_76443480bbf3494984007c5acb6a9850.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4839/files/57243037428.pdf
    • https://cdn.shopify.com/s/files/1/0428/6277/2380/files/jurojenawekabitowil.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_off0000462a.bin
85f5d581cf80c6f4d83fae27dc2e3eac8cdb748f572723e878e881e058a16070
pdf-font-stream PDF embedded font (sfnt) at offset 0x462A 5252 bytes
font_01_sfnt_off0000580b.bin
79a6b3269a4f6f6ec3f29af4e61b98215475394959c1188dd319d2cd38017dc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x580B 10052 bytes