Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bd4fb738862c8a…

MALICIOUS

PDF

42.2 KB Created: 2020-08-23 05:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed2bcebba59ab4dc94b54d2425cf6518 SHA-1: b766698449ed295e42f00028751555f72e4e0aa6 SHA-256: 01bd4fb738862c8ac701c57f5b0a516d50d6d13a6add8d8f2bba90b2b5d8f0bb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link to a redirector service, which is a common technique for distributing malicious content or leading to phishing sites. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=ikea+sheet+sets+canada', suggesting a lure related to shopping or deals. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to host further malicious content.

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=ikea+sheet+sets+canada
    • http://files.multifunctionslab.com/uploads/1/3/0/7/130739119/tobobowosikejaminoz.pdf
    • http://files.barrierfreebuildingdesignpartnership.com/uploads/1/3/0/9/130969080/2021735.pdf
    • http://baxajo.eastsideintegratedprimarycare.com/uploads/1/3/1/4/131453850/vefesexebitife.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/7757/3539/files/24695137387.pdf
    • https://cdn.shopify.com/s/files/1/0432/0185/5646/files/lobuzegegamojum.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/dejatog.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/best_core_java_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9605/files/koluposajadir.pdf
    • https://cdn.shopify.com/s/files/1/0430/6701/5335/files/64239756530.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5983/files/batatibipeviruv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7023/4527/files/hog_swine_raising_business_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/16915868897.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/52745574886.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/waxinajarage.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_off00005f2a.bin
047466165fa129c9fc6ff7c5aa4ec79937f46a9c93e332d9214b9d5daad9b61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2A 4532 bytes
font_01_sfnt_off00006e73.bin
87de7d3f4ef4c1f9b43db1ed170a08f2e5713eb7a2a8324bc8c47f479fee9d42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 9376 bytes
font_02_sfnt_off00008e45.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E45 4324 bytes

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