Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e3f2411d64dc6d…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 18:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 565f3f5d5382f0820f84212c8fdda93c SHA-1: e5d6a6b6aaf363afdd2d68f7e9399f2a43d72c45 SHA-256: 07e3f2411d64dc6db45d6348f125cdb005c5d0e95494eb3b6531b339f2031678
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or SEO spam campaign, aiming to drive traffic to malicious sites.

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.ru/pify?keyword=vaishnava+agamas+pdf
    • http://kitaw.womansclubofpowhatan.org/uploads/1/3/1/3/131398091/335632.pdf
    • http://files.hydrelief.com/uploads/1/3/1/4/131452989/sanulisakavub.pdf
    • http://files.kjvfaith.com/uploads/1/3/1/1/131163533/6750267.pdf
    • http://files.kazmetixartistry.com/uploads/1/3/1/3/131380728/duduxoval.pdf
    • http://files.twelve2outdoors.com/uploads/1/3/0/7/130740053/7f71d1b52415b54.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/vaduvemagutifek.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/vogovopesifab.pdf
    • https://cdn.shopify.com/s/files/1/0433/1097/3083/files/18826812641.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/bragg_vegetarian_health_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/pojumo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/18508079735.pdf
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/97176791687.pdf
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/56987902114.pdf
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/41132955633.pdf
    • https://cdn.shopify.com/s/files/1/0440/6863/4789/files/35026472888.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/46110656018.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/489545174.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/13860729352.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6841/files/11334027246.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000668e.bin
3e2f2f52d96672194dacda863a46c1f1a4d1fbf656b8e3b1f7443e8a7498228e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668E 5352 bytes
font_01_sfnt_off000078b1.bin
b7aff2fbdd92d1736bbdac7661a06bbe6f1b29bfbcda1d1580eea01b785b4aa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78B1 9952 bytes
font_02_sfnt_off00009aa1.bin
12c7bdadd4a86fd2e136cc0c1e159dab2546da0b965bbb3f659076fa60b8678f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA1 2644 bytes

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