Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3dc49a1a0412c39…

MALICIOUS

PDF

63.1 KB Created: 2020-09-01 03:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6962c73c8d1f461cd0b2a31e97e765f SHA-1: 8f07be4ebfb4bbf11a7c8de9e2fc6d05af69da46 SHA-256: f3dc49a1a0412c39d4cf882aa8905bceb89a7be1a3fab8ebbd90f1cc1baadcdc
152 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.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The presence of a large number of external PDF links, many pointing to Shopify, indicates a potential SEO-based distribution or link farm strategy. No scripts were extracted, and the PDF structure itself did not reveal further malicious intent beyond the redirector link.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=appendix+cancer+nccn+guidelines
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/aim_to_misbehave_destiny_2.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5878/files/72564434997.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/berrigan_races_form_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/16333417177.pdf
    • https://cdn.shopify.com/s/files/1/0434/4587/8941/files/fonigevatumaponujanu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6083/9079/files/xugekefuvap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/textbook_of_biochemistry_for_medical_students_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/89243134025.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/logical_reasoning_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2546/files/risewuboxulogebotefen.pdf
    • https://cdn.shopify.com/s/files/1/0432/8456/2086/files/26500983588.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/71837499700.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1146/files/lumidedirisotaxidivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0433/9620/2652/files/13456842030.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/75806663001.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/rodidegaw.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_off0000ba4d.bin
8db640b0af446dced1418587e8279ba6203d4c96d08597efed9037bbd54e78df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4D 5296 bytes
font_01_sfnt_off0000cc67.bin
84ce0734f3b85a29a0aa6b835672231e3c855d65d01b16a1dd38f0c0f08d9ece		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC67 10176 bytes

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