Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a471c2a70040816…

MALICIOUS

PDF

44.0 KB Created: 2020-09-07 08:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df638b025302f30b8a476d6caff0b0ab SHA-1: 424c67bf3a407e03397b457fa722a73625f1360b SHA-256: 5a471c2a700408166efd04428159c4580fc95c97d00522d3c44aafdab7b7c530
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including a primary redirector URL, indicating a link farm or phishing attempt. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the link farm heuristic suggest the document's purpose is to direct users to malicious or deceptive content, likely for credential harvesting or malware distribution.

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.club/wix?keyword=absolute+advantage+theory+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c068f8_4d132ec257eb42dca57b7d09f64288e6.pdf
    • https://static.usrfiles.com/ugd/fa6f14_a84ac96d579c41558a8c3294b51ce56b.pdf
    • https://static.usrfiles.com/ugd/fa6f14_b7bb16ad6475493cbf9311252084f82d.pdf
    • https://cdn.shopify.com/s/files/1/0439/8402/7806/files/free_email_newsletter_templates_for_outlook.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/jeniwenibapup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/66957139819.pdf
    • https://cdn.shopify.com/s/files/1/0450/8113/3219/files/92519101932.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/duwanadajataretosap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6915/3181/files/29919588350.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/2351770783.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78986196578.pdf
    • https://cdn.shopify.com/s/files/1/0429/2666/9987/files/35415422617.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/55827368021.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_off00006d71.bin
4ef883d6198181b717cabb9c86f97bd939f2a2383fc5fe31c274f58e0088e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D71 5596 bytes
font_01_sfnt_off0000807b.bin
da14a508a305023ee200ea8e5a511f40074f7fcb22e6a8b3f2918961f5e8d4ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x807B 10152 bytes