Malicious PDF — malware analysis report

Static analysis result for SHA-256 194e8c7746a3793a…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 05:49:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8264f5ad0ea4f7e9532017e9d523e27 SHA-1: 02785819c3ce29bdbabca04a664796ec37f5f69f SHA-256: 194e8c7746a3793a113c746b88254466619337e67a862c6ba1562868bf6562be
154 Risk Score

Malware Insights

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

The PDF document contains embedded links, one of which points to a known malicious redirector infrastructure. The document body itself is heavily obfuscated but contains the same URL. The presence of numerous other links to Shopify PDFs suggests a link farm or SEO poisoning attempt to disguise malicious intent. No scripts were extracted, but the primary threat appears to be 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.com/wix?keyword=quentin+tarantino+script+inglourious
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/27920239944.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/38396966063.pdf
    • https://cdn.shopify.com/s/files/1/0457/5831/6700/files/kebaxibenapezoter.pdf
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/alphabet_letter_tracing.pdf
    • https://cdn.shopify.com/s/files/1/0435/3032/2084/files/cancionero_puertorriqueo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3214/9148/files/lawexubutepuseneve.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/autocad_architectural_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0465/9580/1253/files/refubigoredemotaporitif.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/jidunawebiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/8052/3678/files/57236801429.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f693ccbc5d6437c9ed79c805889af93.pdf
    • https://static.usrfiles.com/ugd/6f9b04_f79999711bff4df78fa61e06699160a7.pdf
    • https://static.usrfiles.com/ugd/4c1554_6cf0906fe382405aa5b4cb73519b472c.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_off000065c4.bin
f4da630d71914db5840fb59dc53f8c59d7abd1550ea8fbce78cd8dd859aee77e
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C4 5160 bytes
font_01_sfnt_off0000775a.bin
b22c208c29eadacf924f0b8b982a91eb1aa659baeaa5ea664b489e4802f1d553
pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 10888 bytes