Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf0b65d5bd0f1eb…

MALICIOUS

PDF

39.3 KB Created: 2020-08-22 11:38:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10897cf22b53aea6856c6ba678f31e85 SHA-1: a64fd1e4ef7dfb1abe2793e1db06230f871938fd SHA-256: fbf0b65d5bd0f1ebebee03e693203ef25dcdb32d5909cf825867ec2b44db9a69
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=bob+woodward+fear+pdf+free'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of numerous other external PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning tactic to drive traffic to the malicious redirector. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=bob+woodward+fear+pdf+free
    • http://files.imwtuned.com/uploads/1/3/0/9/130969801/zisudu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/nixovadulanewekimogojinud.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/transform_coordinates_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/developmental_psychology_childhood_and_adolescence.pdf
    • https://cdn.shopify.com/s/files/1/0428/1620/9059/files/fapazaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/ardhanareeswara_stotram_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0440/5772/3030/files/53847048798.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2042/files/22048450103.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_off00005d83.bin
ff303c5eaed7c31fe9c9d45e1d569b4a562216c1bf04d32662966c53b8d92919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D83 5104 bytes
font_01_sfnt_off00006f05.bin
f674b2bebfd86507729ebffd95a8d5cdbc888d937ccd025a6ad59195c2905bb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F05 9944 bytes

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