Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba46ec8221b233a…

MALICIOUS

PDF

40.2 KB Created: 2020-08-14 18:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8f03a455e60ea16d69aacd0eed8c3f1 SHA-1: fead6c30df34b60010a13ff76c13921a48c441ef SHA-256: 0ba46ec8221b233afad1e3bcfdf775820295da965347c369eb7c0a35edbf2aa0
154 Risk Score

Malware Insights

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

The PDF contains a deceptive title and numerous embedded links, with one critical heuristic identifying it as a redirector to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The presence of many external PDF links suggests a link farm or SEO poisoning attempt to distribute malicious content.

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.cc/pify?keyword=tnm+staging+of+breast+cancer+pdf
    • http://boliveb.westwoodvolunteerems.org/uploads/1/3/0/8/130874493/397688.pdf
    • http://files.philobands.com/uploads/1/3/1/6/131637714/vesotifafatisib-vegegoxejo.pdf
    • http://rexumuwer.thebatesoutfit.com/uploads/1/3/1/1/131163599/dowilezip-rojit.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1070/9915/files/bubaxedovibaniledepum.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/suname.pdf
    • https://cdn.shopify.com/s/files/1/0430/8316/9943/files/non_diabetic_hypoglycemia_diet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1658/5379/files/69199037462.pdf
    • https://cdn.shopify.com/s/files/1/0431/1977/1799/files/dikemiviz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/numevapifarufisaruva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magizokoluredofet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0048/7332/files/tavudufugaroturoxile.pdf
    • https://cdn.shopify.com/s/files/1/0432/8793/7179/files/vezunapobaperotawegege.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_off00005e15.bin
2b0c65a63d2e5eddec6b13ebf4b3a4df7658f8f92c364182fb6eefa6279c6a8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 5532 bytes
font_01_sfnt_off000070bc.bin
0ecc9bc3c4b43b003e849dd3057726c41aa26ae48be822f174f9cc967567fd33
pdf-font-stream PDF embedded font (sfnt) at offset 0x70BC 10464 bytes