Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbdc1239ef1b19b9…

MALICIOUS

PDF

41.0 KB Created: 2020-08-21 13:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 436b652a640e859757d95c5bc0248aea SHA-1: f9ca27b3be7a3bce943b157a575380e4bf79d759 SHA-256: cbdc1239ef1b19b926dbed13ba6c143d942f8e253f2ddd3f0ce0c3994adde957
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a primary URL pointing to a known malicious redirector. The document body, though partially corrupted, includes the target URL and references medical treatment guidelines, suggesting a lure to disguise malicious intent. The primary malicious URL is https://ttraff.com/pify?keyword=medial+meniscus+tear+treatment+guidelines, which redirects to other benign-looking PDFs hosted on Shopify. The presence of multiple embedded links and the redirector indicate a phishing or scam attempt.

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=medial+meniscus+tear+treatment+guidelines
    • http://files.ppscgc.com/uploads/1/3/0/9/130969655/7a74b25.pdf
    • http://files.mountainmodelaires.org/uploads/1/3/1/8/131871569/faduwobup.pdf
    • http://files.lindseymhottin.com/uploads/1/3/2/7/132712011/62ae72bebc7320.pdf
    • http://files.mtbachelorstash.com/uploads/1/3/0/8/130874526/8431533.pdf
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/pulanifusedowo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/319797966.pdf
    • https://cdn.shopify.com/s/files/1/0450/5419/7910/files/fadurexeb.pdf
    • https://cdn.shopify.com/s/files/1/0443/9313/6294/files/jellicle_cats_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/architectural_drawing_course_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/adventure_capitalist_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/1379/8050/files/2877401417.pdf
    • https://cdn.shopify.com/s/files/1/0440/7656/4630/files/95966554068.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/44255129836.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_off0000619a.bin
ef3cdae564a5278d742d4cce5df54f3c7bf00df190c4c4dd28a9282ab834c93d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x619A 5264 bytes
font_01_sfnt_off00007364.bin
36e2e0be95ccf04a82f14f84c91ffc33c0d006b74ad9069a2e0506a22689b733		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7364 10468 bytes

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