Malicious PDF — malware analysis report

Static analysis result for SHA-256 0383f8d47727fa19…

MALICIOUS

PDF

44.0 KB Created: 2020-08-25 09:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b6b6292880b6d03f85e6d7265f02d55 SHA-1: 7945691217c7315da802da5b636e74e69159ce88 SHA-256: 0383f8d47727fa19f2e4ef9d7abd57dcf719b54c02954bd25a16bf71d08d9186
162 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious infrastructure at 'ttraff.com'. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/pify?keyword=correx+corrugated+fluted+board+plastic+sheets
    • http://files.creamwoodlabradors.co.uk/uploads/1/3/0/8/130814902/6069038.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4164/4963/files/gujej.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/lidarovunixixeraxuwuwez.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/tapobijiraraj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/91028585592.pdf
    • https://cdn.shopify.com/s/files/1/0439/4595/1400/files/cours_anglais_franais.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46287179129.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/95019253876.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/autocad_import_contains_no_objects.pdf
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/not_answering_the_call_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0439/5663/3758/files/katidiwagejazizosoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7536/2198/files/skripsi_akuntansi_biaya_produksi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4224/9631/files/vojazod.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_off00006aa7.bin
ce1a68516afe47155422464871e828cf764b5139aa25099371661b31f9ffa77a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA7 5528 bytes
font_01_sfnt_off00007d66.bin
4b1d45dbf992ae7cb39a0eebd0e1a026615133064aa3bb70bda7ebe46feb50bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D66 11096 bytes