Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4c9e3825f36b77…

MALICIOUS

PDF

46.4 KB Created: 2020-08-01 09:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17b2d06019287515aa076ac3fd9164ea SHA-1: e567b61c8b766103c384329f970633eaebfbefe4 SHA-256: 3b4c9e3825f36b77667e745a4b0580fa6a879fbc69d35de0025b7dd96b6a6331
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final malicious destination. The document body and embedded links suggest a lure related to game builds or similar content to entice clicks. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains a mass of external links, many hosted on Shopify, which is a common tactic for SEO poisoning or distributing malicious documents.

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/pify?keyword=zilean+aram+build
    • http://files.gardenmarketstore.com/uploads/1/3/1/4/131453067/927625a36852.pdf
    • http://files.theboxgateway.org/uploads/1/3/0/8/130873872/6390631.pdf
    • http://files.fticonsulting-info.com/uploads/1/3/0/9/130969746/965765.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4133/files/sagafebofofenaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4444/files/welixinizowepiva.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2821/files/wikisapefodutodukilafo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7400/1825/files/fejemaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4637/9426/files/kidew.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zudofujavulasosajawigubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/pimokagudoziwonudokud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54729765263.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/jikubiwijudimazog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6126/4035/files/mogozavotarukap.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/66380196982.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bed.bin
b76f324446fdc5c1559b2ade1ff6c41aa24c066419f31e5ead73259f381606af
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BED 4580 bytes
font_01_sfnt_off00007b41.bin
5024fedd7c077057342036e9a336a8f59c8993f5eb54af68683f312321fd5e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B41 10452 bytes
font_02_sfnt_off00009ef2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF2 4324 bytes