Malicious PDF — malware analysis report

Static analysis result for SHA-256 41596d3b81320d35…

MALICIOUS

PDF

42.1 KB Created: 2020-08-05 05:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a23eefca46c37a0427d38b88ab96695f SHA-1: 82f23ceebb97d2e80a0151889fa22aecc4f5bd62 SHA-256: 41596d3b81320d35f47fbcb099a51ffe70b7dfc3f9e57f6f000c3d958d8d50d7
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic indicates a direct link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily corrupted, contains the URL that triggers the malicious redirector. The presence of a callback lure heuristic suggests a potential phishing or scam attempt.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=biological+wastewater+treatment+process+pdf
    • http://files.shaunagoodingreiki.com/uploads/1/3/2/7/132740533/9a16e.pdf
    • http://files.chipperchadbourne.com/uploads/1/3/2/6/132681464/9455033.pdf
    • http://files.steplota.com/uploads/1/3/0/8/130814078/zizutafifinej-dudiz-tovisaxorito.pdf
    • http://files.silverstatesmenbarbershopchorus.com/uploads/1/3/1/8/131856122/juperu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/judegesuzopo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5955/9065/files/bartlett_s_bisection_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0432/3917/8399/files/medical_lab_technician_resume.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/wusidu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4403/5993/files/call_me_maybe._mp3.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/relul.pdf
    • https://cdn.shopify.com/s/files/1/0428/7925/4694/files/56050565226.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xokuwunojuvilil.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/83104639671.pdf
    • https://cdn.shopify.com/s/files/1/0434/0675/3948/files/81948024492.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7094/files/fixuruzosopijoreniromuda.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_off000066ae.bin
fcbeb42145a0d94af2f135e98a1a017c798f59b8006b230c3464e968b975577f
pdf-font-stream PDF embedded font (sfnt) at offset 0x66AE 5616 bytes
font_01_sfnt_off000079c7.bin
98e41047bfae950e68eb2cd66f2d40ee65b0fcc49b75d9e9c149254444fa314b
pdf-font-stream PDF embedded font (sfnt) at offset 0x79C7 9892 bytes