Malicious PDF — malware analysis report

Static analysis result for SHA-256 69964bd745b2ccad…

MALICIOUS

PDF

45.9 KB Created: 2020-08-21 05:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 030ee67c503d9624277eb28a6f555bc8 SHA-1: 02fbeefb4ffd1e135e6d55cd718dfcb228941b93 SHA-256: 69964bd745b2ccadabc08bb28fef8d14cce9ef94ebacabfd5210ed6e963a4e6b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. One such link, 'https://ttraff.com/pify?keyword=3d+max+blender', is explicitly flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous PDF links indicates a link farm strategy, likely to improve search engine ranking or distribute 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.com/pify?keyword=3d+max+blender
    • http://zasatog.cccommunityscholarships.org/uploads/1/3/1/3/131383314/1040283.pdf
    • http://files.stamfordpresbyterian.com/uploads/1/3/1/4/131438056/3653781.pdf
    • http://files.leanwithluke.co.uk/uploads/1/3/0/9/130969368/nimuzezireroxenefos.pdf
    • http://files.wirefreebra.com/uploads/1/3/0/7/130775719/7a2084125.pdf
    • http://files.ashleybiscan.com/uploads/1/3/0/7/130776298/wopatapofevogefo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/1001/2837/files/alzheimer_disease.pdf
    • https://cdn.shopify.com/s/files/1/0432/7276/5598/files/tutebulemasixuzoxumiz.pdf
    • https://cdn.shopify.com/s/files/1/0454/7146/5630/files/dagobakobojo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5945/3860/files/ledurovagawagoxudedizixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/aptransco_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/9961359960.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/calistenia_workout.pdf
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/vuxopogovugafirezaruf.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/67848617439.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7598/files/destination_a2_grammar_and_vocabulary_chomikuj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007513.bin
2b499d5680f9d361bd9eb00d7f5c305667e6f542387b93c27fdea420d4a85646		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7513 5068 bytes
font_01_sfnt_off00008636.bin
e81183a0d8cb5fd76aef6a93c60ce5eb4b9f3b9794e8d6605fe5b52144edb0d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8636 10672 bytes

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