Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b4f1bb8f38b1b1…

MALICIOUS

PDF

73.9 KB Created: 2020-08-24 22:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aee86e914f4d9eb316685d7438f56923 SHA-1: 991f6f6713592da447eb624016f41a286d3e77c2 SHA-256: 93b4f1bb8f38b1b1895747dbd1b2ef89e55b3cb05c7867321b26802d7c3edd77
150 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 designed to lure users into clicking on further malicious links. The document body, though heavily obfuscated, contains the URL and a title suggesting a lure related to environmental calculations. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve SEO for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=greenhouse+gas+emissions+calculator+guide
    • http://files.twigandnibbleshop.co.uk/uploads/1/3/0/9/130969699/710ca6cae.pdf
    • http://zurop.pawsadventurewalkingservice.co.uk/uploads/1/3/0/7/130775735/gobupufisi-vodifaviget-xurebuvefodegop.pdf
    • http://files.alldonemarketing.com/uploads/1/3/0/7/130775221/3822325.pdf
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdf
    • https://cdn.shopify.com/s/files/1/0433/6851/3686/files/jibagofupozula.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/xazuposelapugebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/98861814752.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/luperisixofufazi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2320/files/45196742833.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/fakipibewumixetelefex.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/52493123034.pdf
    • https://cdn.shopify.com/s/files/1/0430/1484/8671/files/12988829898.pdf
    • https://cdn.shopify.com/s/files/1/0432/2577/6288/files/80856314514.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/zugovakubidem.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_off0000cf33.bin
97d4b5b74dd96873617e51d41cb7585f04fe055391481d9f308b23d0218969bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF33 5384 bytes
font_01_sfnt_off0000e152.bin
f862deb43e0ca409c5750a15f3cbc47f47a201b2280c0895c14ff8fab43afc88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE152 10304 bytes
font_02_sfnt_off000104ab.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 16204 bytes

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