Malicious PDF — malware analysis report

Static analysis result for SHA-256 d13cdd71d85fc38e…

MALICIOUS

PDF

45.9 KB Created: 2020-08-14 03:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c05e03ce89479d51abef945fa3e1b9d5 SHA-1: 7ea6004f4bd1ef03a220fcae47d94678d418769b SHA-256: d13cdd71d85fc38e0eda674d7cae61f4d6fccecb801518305bea1a7327715c87
150 Risk Score

Malware Insights

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

The PDF contains a high density of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a tactic of SEO poisoning or a phishing lure, where the document's content is designed to attract search engine traffic or trick users into clicking malicious links. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/wb?keyword=my%20age%20of%20anxiety%20pdf%20free
    • http://files.rachelawallis.com/uploads/1/3/2/6/132695862/nuguzubaj.pdf
    • http://files.skatingclubofjacksonhole.com/uploads/1/3/1/4/131406849/kaxojuwuxugedin_mixapoz.pdf
    • http://sazak.jocelynoades.com/uploads/1/3/1/6/131636744/5974258.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/detedodasawiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/waziwise.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/risururek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/bescherelle_complete_guide_to_conjugating.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/rexuxexisivubi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/51920425646.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/purunabaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/7319/1580/files/93539330645.pdf
    • https://cdn.shopify.com/s/files/1/0436/5369/3593/files/hostel_building_plans_autocad_drawing.pdf
    • https://cdn.shopify.com/s/files/1/0451/0410/3576/files/48882446957.pdf
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/xazojebulojamux.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/certified_ethical_hacker_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/anime_girl_memes.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_off00007510.bin
a03476342f8f6930eb9d798665fd398e33ae2136b1693f5dd8447bea70bb32ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7510 5176 bytes
font_01_sfnt_off000086cb.bin
e4dad8cd3dd9f68f7d530ece6a0940c57c65435b416a3512fd035c5f30b4375a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CB 10644 bytes

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