Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c6c854f634b9a1…

MALICIOUS

PDF

45.5 KB Created: 2020-08-16 22:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9e5bd7924c29841e783608d652cedc5 SHA-1: ecc039ec009501e5cb1991110bc0d41dd6b02667 SHA-256: d6c6c854f634b9a1bb9535b50b4fbb2f321d956c6d3ffde79e4f70dfe629c7b8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, one of which, https://ttraff.ru/pify?keyword=osrs+dagannoth+king+guide, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain references to this URL and other Shopify links, suggesting a lure to external content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external links points towards a link farm or redirection strategy.

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=osrs+dagannoth+king+guide
    • http://files.midwaybaptistnc.org/uploads/1/3/0/7/130775084/be61a0.pdf
    • http://files.prescottvalleylittleleague.com/uploads/1/3/0/7/130740385/zolezemamel-vuvotoxitowu-lidezoviza-bireze.pdf
    • http://files.michael-debbie.com/uploads/1/3/1/8/131872054/6cf37bb42a6b1f2.pdf
    • https://cdn.shopify.com/s/files/1/0429/3751/6191/files/26188929706.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/just_standards_real_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/0017/6544/files/rubutojajefogamazanul.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/61486218926.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/20248690646.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6911/files/lifemejaju.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/advantages_and_disadvantages_of_nuclear_family.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/91160171979.pdf
    • https://cdn.shopify.com/s/files/1/0445/6411/9716/files/6767265321.pdf
    • https://cdn.shopify.com/s/files/1/0431/7868/8674/files/sotusuli.pdf
    • https://cdn.shopify.com/s/files/1/0441/2620/8152/files/proc_import_sas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/rarazarureniba.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007502.bin
ea7ce996072c803f72e4babed33f4ea1dfd10a61411f098e9c9a942b750d8488
pdf-font-stream PDF embedded font (sfnt) at offset 0x7502 5144 bytes
font_01_sfnt_off00008676.bin
cf5695cc5b1d0162b1a7da4e190b0f5ead4ad00bddae6ad37a4075754c2e3e80
pdf-font-stream PDF embedded font (sfnt) at offset 0x8676 10060 bytes