Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37bb5ce8d3d794f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-05 09:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09f925ef2e751efa982f5a37cee85d93 SHA-1: f09a2e9b8fd46b8e05069a994084ed1e4c7f11db SHA-256: b37bb5ce8d3d794f6a3b86937abd52910f92109c474583fb09941210fa4541c3
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a vocabulary PDF. This indicates a phishing or malware distribution attempt. The presence of numerous other links, many pointing to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility and lure victims. No scripts were extracted, but the primary malicious activity is the redirection to the malicious URL.

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.com/pify?keyword=ingilizce+e%25C5%259F+ve+z%25C4%25B1t+anlaml%25C4%25B1+kelimeler+pdf
    • http://files.ortegaartstudio.com/uploads/1/3/1/4/131453610/xuwiwunu.pdf
    • http://files.thestitchisbackpdx.com/uploads/1/3/1/4/131453177/gaped_wafavavobazim.pdf
    • http://files.studentsonsustainability.ca/uploads/1/3/2/3/132302992/kadura.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/16404223725.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/unusual_architectural_thesis_topics.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/47856138627.pdf
    • https://cdn.shopify.com/s/files/1/0437/0766/2504/files/30947300050.pdf
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/39260957251.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1395/files/medical_instrumentation_application_and_design.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/36029535406.pdf
    • https://cdn.shopify.com/s/files/1/0433/3898/9718/files/97154120091.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/zepanamejobitiwebiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/4084171752.pdf
    • https://cdn.shopify.com/s/files/1/0437/6654/6583/files/introduction_to_entrepreneurship_books.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_off00005c57.bin
83927e8c39e6156c0c310ef864ea233241709bff0bd9f4a3c087e142f33eddc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C57 5688 bytes
font_01_sfnt_off00006fb5.bin
c9c850e9c351ce199d5e9d1c42a783cd39d33267a74ccb43d8a2fed304f07254		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB5 1796 bytes
font_02_sfnt_off00007840.bin
e24f08177761cb8b7b90143c3dabc40664ea42cd7018a07011eab69ad8833190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7840 11660 bytes

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