Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb8805e1b639c89…

MALICIOUS

PDF

40.8 KB Created: 2020-08-08 16:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85942359865e462c42de967835456a8c SHA-1: 0ff060d8d5af0039fa164cf8b8238b92e046a85e SHA-256: 0cb8805e1b639c89f19f041a58f590ce46a06885ab0590b973b6723fb9b0d435
154 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to mimic search results for academic papers, with the primary link leading to a redirector. This redirector, 'ttraff.cc', is known for distributing malicious content, likely leading to further malware downloads or phishing pages. The document's structure and embedded links strongly suggest a phishing or malware distribution attempt, masquerading as a legitimate resource.

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=abnormal+psychology+17th+edition+pdf+free+download
    • http://files.integratedbodymind.com/uploads/1/3/1/4/131408899/362880.pdf
    • http://fozowadeb.parramattagaolghosttours.com.au/uploads/1/3/0/7/130739275/8851094.pdf
    • http://files.leaddogdesigns.com/uploads/1/3/1/4/131437605/4746825.pdf
    • http://files.heardtodayatschool.com/uploads/1/3/2/7/132740553/rafupibedimirer.pdf
    • http://files.bntarms.com/uploads/1/3/1/4/131437683/bumuzakilirixamuji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5353/1807/files/15741385261.pdf
    • https://cdn.shopify.com/s/files/1/0430/7573/1607/files/75132711203.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/vumafetexogolotapapa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/pasemuvibekakoraguwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/72456957451.pdf
    • https://cdn.shopify.com/s/files/1/0432/2636/6111/files/madizakodewokikonafebefar.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/bajojil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/xorejefenitowegagot.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/angles_of_depression_and_elevation_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/sanamalipeti.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/31889196991.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/ditonilikakadatunow.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_off00005f7c.bin
dc7eeae139dba97c7b462eb323d00f535f1ffca655518f9bf061b87bbb8ea8ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7C 6024 bytes
font_01_sfnt_off000073ee.bin
4ac62d6a36b801e5d758a449e64d3e447d03aa49be3d844a0a5abe2ecdf6245b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 10012 bytes

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