Malicious PDF — malware analysis report

Static analysis result for SHA-256 3514692e7c29d8cb…

MALICIOUS

PDF

60.6 KB Created: 2020-08-03 12:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28d068616bbf1deb9768e6bf78a9301e SHA-1: 002489cdac2b9b382308c0da7f78b7dbc1ab6943 SHA-256: 3514692e7c29d8cbe33f56bbd3eec8d69b8e6d0b39aff2b6132c2bc0cc485cca
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=pdf+strategic+marketing+plan'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on shopify.com and other domains, suggesting a link farm or redirection scheme designed to lead users to malicious sites. No scripts were extracted from this sample.

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.cc/pify?keyword=pdf+strategic+marketing+plan
    • http://files.stjohnlutheranchurch.com/uploads/1/3/0/7/130739311/9370643.pdf
    • http://files.keepdivealive.com/uploads/1/3/1/4/131453592/e0b38208b324ffc.pdf
    • http://files.betweentheriversgathering.com/uploads/1/3/1/6/131606815/pedagezamokoj.pdf
    • http://files.jeffdentonfit.com/uploads/1/3/1/4/131437318/zovujudilererogel.pdf
    • https://cdn.shopify.com/s/files/1/0434/4761/5649/files/95880594464.pdf
    • https://cdn.shopify.com/s/files/1/0433/7428/0855/files/73502069725.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/34093146059.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/88584981791.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/resafurugi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/mopemezevefezejenudo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/fiwakozijil.pdf
    • https://cdn.shopify.com/s/files/1/0427/5381/8790/files/pdf_to_word_converter_online_through_mail.pdf
    • https://cdn.shopify.com/s/files/1/0434/6655/5556/files/xevifibuwinu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/tales_of_vesperia_side_quests.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/daginijujatu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7740/files/school_dance_full_movie_download.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_off0000ae7e.bin
eed8cc2c177e04fe98d4c495ab05caca62b52c0f7e481b8d6b5b8a12e887dcb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7E 5540 bytes
font_01_sfnt_off0000c14d.bin
06ae114a44ed99b81dd44f3c4b7fd035c349ffe4edd822d92e036690c1028921		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC14D 10720 bytes

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