Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9c9e52bbbff252…

MALICIOUS

PDF

36.0 KB Created: 2020-08-09 05:24:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee089b61b32255f69335d47fad2cf69c SHA-1: 2a07de8b64eb67c6c7759ab275f90c09b532842f SHA-256: 6e9c9e52bbbff25234891fd709c68dd53c525b75374feb24911862e22ed44d42
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on Shopify. One of these links, however, directs to known malicious redirector infrastructure. This suggests a tactic of using a seemingly benign document to host a link farm, with at least one link intended to lead the user to malicious content. No scripts were extracted, but the presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly indicate a phishing or redirection attempt.

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=cgegis+table+april+2020+to+june+2020+pdf
    • http://files.ellertonwesleyanchurch.com/uploads/1/3/1/3/131380995/9102525.pdf
    • http://files.casa-office.co.uk/uploads/1/3/1/3/131383478/fifabolov-polebeleletudo-dusavapa.pdf
    • http://files.maryqueenofireland.com/uploads/1/3/0/7/130775707/5641118.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/kujura.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0728/files/jg_ballard.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/49978384804.pdf
    • https://cdn.shopify.com/s/files/1/0440/5978/7414/files/michael_connelly_the_burning_room.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/dugojoxonafadosakexefirav.pdf
    • https://cdn.shopify.com/s/files/1/0437/2866/6785/files/acute_myeloid_leukemia_review_article.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/wobojonisiwukorojow.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/64681788015.pdf
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/31872166470.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/61687014771.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3961/files/pigogajamikolotuxagote.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_off00004e69.bin
35163c41f1616273716ffaba937988cacb55c0acbdafbcf0c6ffee156c91ccb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E69 5604 bytes
font_01_sfnt_off00006183.bin
fb75b1977ec52e9955ac6bbf73d85d9903e13bae1aaeabddb84fb4edb2097cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 9844 bytes

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