Malicious PDF — malware analysis report

Static analysis result for SHA-256 237ff6f9aa3bad54…

MALICIOUS

PDF

41.6 KB Created: 2020-08-06 15:21:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dd18f65ec89366dd761624f4d59c499 SHA-1: ed6bc747224d1b81c83c92a9f73edd3c4f3b4c05 SHA-256: 237ff6f9aa3bad548c852d9e194e4996cead4f3b9f04b7362991e2f9c34df01a
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.com. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=subject+and+verb+agreement+worksheets+pdf', suggesting a lure to a malicious site disguised as a worksheet download. No scripts were extracted, limiting the analysis of further payload delivery or execution.

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=subject+and+verb+agreement+worksheets+pdf
    • http://files.carbonneutralnetwork.org/uploads/1/3/0/9/130969573/nidakefale.pdf
    • http://files.rorymacdart.com/uploads/1/3/1/4/131454850/wuzosedinag-ropivu-kuvegetefux.pdf
    • http://files.kingfisherwellbeing.com/uploads/1/3/1/6/131636872/vofel.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/10547035351.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/2622136366.pdf
    • https://cdn.shopify.com/s/files/1/0432/7453/5067/files/trap_the_soul_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/25820747628.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/88321486735.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/90247631282.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/gibakeremuweguresu.pdf
    • https://cdn.shopify.com/s/files/1/0439/3749/7243/files/puduwoje.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/73979124000.pdf
    • https://cdn.shopify.com/s/files/1/0428/7810/7811/files/learn_basic_english_grammar_with_pictures.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_off0000617b.bin
60dcbd3d729634cc7049008d6afba63623516ff1904769bf4800cd51e6796063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 6072 bytes
font_01_sfnt_off0000761a.bin
57a97ca5961b7d675614ec13ab48e5b326c5a4ef1e13716aec93e771293c8be1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761A 10288 bytes

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