Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead59f19a4b723b2…

MALICIOUS

PDF

33.9 KB Created: 2020-08-18 14:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2968fb52c20782db101c8d56c7892057 SHA-1: 39d9d9c16b31918ed150f1455f1e4d8a1bbed81d SHA-256: ead59f19a4b723b23ca6d9467b4ed5f1edf9c98fbf554db425631701a8207173
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=blade+and+soul+beginner+guide+2018'. This URL is embedded within the document body, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious.

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=blade+and+soul+beginner+guide+2018
    • http://files.voiceofjonescounty.com/uploads/1/3/1/4/131438260/1827386.pdf
    • http://files.seasonstravels.com.au/uploads/1/3/2/6/132682134/c8e6739eb7205cb.pdf
    • http://files.josephmace.com/uploads/1/3/1/0/131070113/duvamowizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/69578283723.pdf
    • https://cdn.shopify.com/s/files/1/0447/4057/5386/files/preparative_centrifugation.pdf
    • https://cdn.shopify.com/s/files/1/0439/3595/7147/files/28671123694.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/fepawuroxetop.pdf
    • https://cdn.shopify.com/s/files/1/0436/1384/7710/files/physics_for_class_10_sindh_textbook_board.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0924/files/abakada_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/26665950053.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/bapebigifo.pdf
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/69440265282.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/munenivugotomixuvalomup.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/zudetavevolokesiretifa.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_off000046da.bin
b39aaa43a9bea80992039543163d14631a77ad662e392159fab4fc2446d25443
pdf-font-stream PDF embedded font (sfnt) at offset 0x46DA 5700 bytes
font_01_sfnt_off00005a43.bin
9b97ba26bf946f750110070d713686cead8d131d7ce214505c21af95fcd74748
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A43 9564 bytes