Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f04847aae04b189…

MALICIOUS

PDF

96.1 KB Created: 2020-09-07 09:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc6e0cafd3867df247603d6554e9581 SHA-1: 70bbdc9f12ad8759863cb860b935cf181fa61228 SHA-256: 7f04847aae04b189579c77d74e1c1e3ea618a6f5e442f67487c8d244072c11e2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a lure related to 'Fallout 76 tadpole badge exam answers'. The document also hosts a large number of external PDF links, many of which point to benign Shopify URLs, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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/wix?keyword=fallout+76+tadpole+badge+exam+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0460/1872/3999/files/rutakusumij.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5187/files/33839864639.pdf
    • https://cdn.shopify.com/s/files/1/0436/9979/8166/files/vukanezanizevex.pdf
    • https://cdn.shopify.com/s/files/1/0433/5134/3269/files/93137191375.pdf
    • https://static.usrfiles.com/ugd/fa6f14_dbd21083f7364740b4340f461a5a654b.pdf
    • https://static.usrfiles.com/ugd/f46427_7df89c23bbef42309a83c281871c51fe.pdf
    • https://static.usrfiles.com/ugd/d6af85_343b50faf008468f939a4896ee2fb47a.pdf
    • https://static.usrfiles.com/ugd/32acb1_dcb42a3c52df4d3d8ee9a49995f51e3f.pdf
    • https://static.usrfiles.com/ugd/76b6de_ba777dc895c7422aac3e5f447f288b83.pdf
    • https://static.usrfiles.com/ugd/eaf48f_894c5ec25e5641cf952c9d318332c0cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_0f1025a04ad5401f862ceab7ce9da77f.pdf
    • https://static.usrfiles.com/ugd/0779a3_9517b7e39b094e95bd55f90c932e977d.pdf
    • https://static.usrfiles.com/ugd/0dd040_e518febe3d764b7faa9e50e5d03e1984.pdf
    • https://cdn.shopify.com/s/files/1/0430/8926/4794/files/defense_platform_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/giwapibatokag.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_off00013b71.bin
bc4e94bc0810e324aaa9dc498cba3d39e748a95c2319b7947cfcb60f5fe96f4f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B71 5768 bytes
font_01_sfnt_off00014f1a.bin
6808036f7f88025e105b7ef8b0bcc34a260ce0446aa7e728ff57ca72d926125d
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F1A 10592 bytes