Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb10832d7102e50…

MALICIOUS

PDF

37.1 KB Created: 2020-08-29 07:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdffd16da0187d2646a38c459e641e60 SHA-1: a7642c5c02dff055b01e1c99791e74b8126bf9cc SHA-256: 9bb10832d7102e502be3dadcd485c1498ec1be02477c23204c48f2edd9da9185
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 'ttraff.com', which is used to lure users with search engine optimized content. The document body, though heavily obfuscated, contains the same URL and references a 'Yugioh' download, indicating a social engineering lure. The presence of a mass external PDF link farm further supports the malicious intent of redirecting users to external, potentially harmful, resources.

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/wix?keyword=yugioh+dark+side+of+dimensions+downl
    • https://static.usrfiles.com/ugd/b8c837_f22cdf1bbe9640b6bb20ee109ac9ce38.pdf
    • https://static.usrfiles.com/ugd/b8c837_edaa6cb7a74a450c919441e89df33d72.pdf
    • https://static.usrfiles.com/ugd/b8c837_998c35b929f94114bcb44703786bc381.pdf
    • https://static.usrfiles.com/ugd/b8c837_667dfbe41eec4e3195ef6593cafb208b.pdf
    • https://static.usrfiles.com/ugd/b8c837_58d831476a6645cba70ad109b2a43909.pdf
    • https://cdn.shopify.com/s/files/1/0462/3925/2631/files/17611515916.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/11751620181.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/someone_noone_anyone_exercises.pdf
    • https://static.usrfiles.com/ugd/b8c837_eef65faab57c451da30947b4172d077f.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5c930cd192341068dc5cb433cd6616b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d76c244ae7947faaaadb2c0fb6b1ba1.pdf
    • https://static.usrfiles.com/ugd/b8c837_9151738f30464518a1a30bcad4501425.pdf
    • https://static.usrfiles.com/ugd/b8c837_38a6cd54b61f4eedb5f1e2d2afd598b3.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_off0000449b.bin
5fd26224a684b09614534f5ddaec5c44008f332022602d24cb04338b72bf5a5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x449B 3976 bytes
font_01_sfnt_off000052be.bin
f36e3b3a9ba4b0cd7a0e5caf27b6ee82db55db1912c09bee180abac5263a20b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x52BE 5436 bytes
font_02_sfnt_off0000652e.bin
f577e2e4e7ed10a193af0ea195dc0cf3d08fe006762bf1018efcff0e50808cf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x652E 9520 bytes