Malicious PDF — malware analysis report

Static analysis result for SHA-256 c233f1fb76409bdd…

MALICIOUS

PDF

50.8 KB Created: 2020-08-06 02:14:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd92ed820874a72c253f9099acdba8a6 SHA-1: b767291ea3a653fcfeff113503ae2479e52b6d5a SHA-256: c233f1fb76409bdde5e12cc0597ec589fe6b24c0419012d850bea49993be39c0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to Shopify, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the URL that triggers the redirector, reinforcing the malicious intent.

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.cc/pify?keyword=introduction+to+geometrical+construction+pdf
    • http://files.foltzcenter.com/uploads/1/3/1/3/131384663/7762501.pdf
    • http://sujaval.anciolina.com/uploads/1/3/1/8/131856772/gutodagefugak.pdf
    • http://files.cottonwoodfarmok.com/uploads/1/3/0/7/130775247/7237395.pdf
    • http://files.elitesandvolleyball.com/uploads/1/3/1/8/131856627/d3df6b86f3c.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/94337824780.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/usarec_form_1176.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/tazamuwixapupotawinowap.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/anatomy_and_physiology_of_the_lungs.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/mimenidaxexevo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/alleluia_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/7213/5074/files/danarojasibapupet.pdf
    • https://cdn.shopify.com/s/files/1/0435/1941/0335/files/wikufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86187089948.pdf
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/22187369015.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/2020_calorie_meal_plan_bodybuilding.pdf
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/nenokigilomezerikar.pdf
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/42724742627.pdf
    • https://cdn.shopify.com/s/files/1/0431/9608/8481/files/static_gk_capsule_gradeup.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_off0000735b.bin
bd9bd554d03254731f114bb9a13b522062570a8e287837755902ae4298a6e8ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x735B 5412 bytes
font_01_sfnt_off000085a8.bin
224b30ddfd029eaf6738e8766f8fa73e100478f1a320104f67d30db50413bf74
pdf-font-stream PDF embedded font (sfnt) at offset 0x85A8 10076 bytes
font_02_sfnt_off0000a85c.bin
ab6a2d92c6195441154fe03e3add47570783810922a3b82dfc3833ffb97f5f96
pdf-font-stream PDF embedded font (sfnt) at offset 0xA85C 16072 bytes