Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e2f7e3b101c60a…

MALICIOUS

PDF

44.0 KB Created: 2020-08-16 00:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4caa19134c12fc4c6cbc6a60540e54b SHA-1: cbf57c7deeb6dd9b72cabebe6dec4d08aea58cb3 SHA-256: 17e2f7e3b101c60a88428e271356a28624fd8f5cafd80736fa47256feb045076
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Canada food guide recipes'. The PDF also contains a large number of external links, as noted by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO poisoning attempt. No scripts were extracted, but the presence of malicious links indicates an attempt to redirect the user to a harmful site.

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/pify?keyword=canada+food+guide+recipes
    • http://files.angelaslatercomposer.co.uk/uploads/1/3/1/3/131397930/d2147ac2b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/38453733473.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/86438340941.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/breadboard_circuits_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/23867370570.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/87164876941.pdf
    • https://cdn.shopify.com/s/files/1/0438/2133/4688/files/luzitoxiziwigovilaxu.pdf
    • https://cdn.shopify.com/s/files/1/0443/0227/0620/files/18403533514.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/57458961803.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/pajogezokamorazubotavad.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000608a.bin
d971014197eac8a1caf65e9523cc3f26d6c0bd5d73b5ccaa2f5581115dc2abdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 5116 bytes
font_01_sfnt_off00007201.bin
71e52b237f96cb7f5d167b8a6e8865fa47cbd275dcb6975fb339c87df8cbbe10
pdf-font-stream PDF embedded font (sfnt) at offset 0x7201 10420 bytes
font_02_sfnt_off000095a2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x95A2 4324 bytes