Malicious PDF — malware analysis report

Static analysis result for SHA-256 0592360ea446cdc7…

MALICIOUS

PDF

41.8 KB Created: 2020-08-01 10:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91a9872174dfabc65126c9af27c9b417 SHA-1: c709f241efd496996c44df1b1170220f216bf601 SHA-256: 0592360ea446cdc774fdbce679034924ca59c83527ce13216d79141cd5831dd9
154 Risk Score

Malware Insights

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

The PDF document contains a deceptive lure related to an air compressor manual, embedding numerous links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=champion+air+compressor+manual'. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The presence of many external links suggests a link farm or SEO poisoning tactic to 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=champion+air+compressor+manual
    • http://files.hospismelaka.org/uploads/1/3/1/6/131636719/fomek.pdf
    • http://files.michellemckinstry.com/uploads/1/3/1/1/131164236/xotekiliru-dumat-sakorobe.pdf
    • http://files.the-songbirds.com/uploads/1/3/0/8/130873957/fawagot.pdf
    • http://files.theporschespecialist.com/uploads/1/3/0/7/130775953/dfb9e636513e3e4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/lovisuwef.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/tamibazenizetegatefisixa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/36911702113.pdf
    • https://cdn.shopify.com/s/files/1/0428/5726/7359/files/49772272954.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/70168554491.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0434/6429/4557/files/tututoxajilijiwo.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/wugonobefavozival.pdf
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/miros.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8558/files/47888641650.pdf
    • https://cdn.shopify.com/s/files/1/0431/2956/9434/files/43443763286.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/sinejifubimibefisekola.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_off0000676c.bin
c4d1cdd081f2be68ab7450aa08d71efdc6304f277e92c9c7401748eb0dbce234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x676C 5076 bytes
font_01_sfnt_off00007879.bin
1db5ded47ae85b0b69f5a744fd56181a502a608c79bfd3666e8f9e8d0f0c78e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7879 9856 bytes

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