Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff430648e2383ea…

MALICIOUS

PDF

41.7 KB Created: 2020-08-09 01:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afbef482d1494747d00c80740e65b304 SHA-1: 21bf58e42d2fa401c47b2b0f614d19f094ce2c9e SHA-256: 9ff430648e2383eaa5901fe0b326dd79d36546b035f6492915978cdfca330835
150 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised with a seemingly relevant keyword. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting an attempt to lure users to malicious content. The document body, though partially corrupted, contains the same deceptive link and topic.

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.com/pify?keyword=causes+of+peptic+ulcer+pdf
    • http://files.normansignsanddesigns.com/uploads/1/3/0/7/130740323/jitidutixedax.pdf
    • http://files.institutionalamez.org/uploads/1/3/1/0/131070207/luvavafa.pdf
    • http://files.yellowroseevents.co/uploads/1/3/1/4/131406498/d847b5f82db26.pdf
    • http://liwaxak.onixangelcreations.com/uploads/1/3/2/6/132695569/347644c5.pdf
    • https://cdn.shopify.com/s/files/1/0427/4854/3142/files/xufipomosedolajesi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/73505604074.pdf
    • https://cdn.shopify.com/s/files/1/0441/0291/0104/files/75447616377.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/jikelixuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4985/files/11332800401.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4423/files/duwufa.pdf
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/guxobadimesig.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/vexebixa.pdf
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/28252148775.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/kapote.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3294/files/zobew.pdf
    • https://cdn.shopify.com/s/files/1/0428/4963/2415/files/52566237743.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_off000065f3.bin
9fc0a724cdff4d3f260be4bffe8719a2b22ec94c35d400c695c7171c7d875233		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F3 5052 bytes
font_01_sfnt_off0000772c.bin
8d4dc861dc9cdd0630aa0f68382fa3fc09027f8e128dc55d806d155d3e28b804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 10432 bytes

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