Malicious PDF — malware analysis report

Static analysis result for SHA-256 648ab53410cf9f09…

MALICIOUS

PDF

43.5 KB Created: 2020-08-01 10:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80489f16162498bf4f895ef0d3c2dec8 SHA-1: 847d58240094f82287d5559553c6fb7d22de0aab SHA-256: 648ab53410cf9f09094b4810b31e8601a5a16740000a81d0a1c89e488b1ab34d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/pify?keyword=ds2+twinkling+titanite'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains hosting PDF files. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through these embedded links, potentially leading to further malicious content or phishing attempts.

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=ds2+twinkling+titanite
    • http://files.jessicawelshpiano.com/uploads/1/3/1/3/131383673/8891393.pdf
    • http://files.windycityknittingguild.com/uploads/1/3/2/7/132740584/51be0.pdf
    • http://files.donesladventure.com/uploads/1/3/1/4/131438079/2417918.pdf
    • http://files.medfieldheightspto.com/uploads/1/3/1/0/131070190/joridesaz.pdf
    • http://files.giannasbeef.com/uploads/1/3/0/7/130775856/xuvar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/23482965885.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/jojebigotedafarudij.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/xavokoxolozefojibemaxob.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/55066387924.pdf
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/nadoxad.pdf
    • https://cdn.shopify.com/s/files/1/0432/1122/7300/files/42397063778.pdf
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/88037328467.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0942/5056/files/11431508296.pdf
    • https://cdn.shopify.com/s/files/1/0437/1133/2507/files/62319649296.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_off00006d0d.bin
8ae00456c372832c9ed73e147e44ac621eaac35dca26acaeab34930355d8b2b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0D 5044 bytes
font_01_sfnt_off00007e6b.bin
b641e6cd39538fb4dcda1914fd296badd8185cff45545dc436ca9e0a15536b8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6B 10272 bytes