Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5a091c4814d1308…

MALICIOUS

PDF

41.4 KB Created: 2020-08-14 12:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b37d8b3a91a948086de3521658d3f766 SHA-1: 6189466e4b5c097cedb38f1da168ed7cfcd1fb01 SHA-256: e5a091c4814d13088430f53d0bfea1992f85b96be7030bf3a1ed7ef7aeeb36a0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a high number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Jervis bay marine park map pdf' and the URL 'https://ttraff.ru/wb?keyword=jervis%20bay%20marine%20park%20map%20pdf', suggesting a lure to disguise malicious redirection. The ML classifier also strongly flagged this PDF as malicious.

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=jervis%20bay%20marine%20park%20map%20pdf
    • http://pujefuda.fidelcantephotography.com/uploads/1/3/2/6/132681352/vinabuvalit_wujolapav_biwite.pdf
    • http://files.mnnicebaseball.com/uploads/1/3/1/3/131383586/c7d5c81f08de6ec.pdf
    • http://files.fiddlersgreenaussies.net/uploads/1/3/1/8/131857419/faweravaluxovimobenu.pdf
    • http://files.universalsportsstrength.com/uploads/1/3/0/7/130740483/7ef72ff.pdf
    • http://files.songyingfang.com/uploads/1/3/0/8/130874495/ad03c08f9d67.pdf
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/brandenburg_concerto_piccolo_trumpet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suton.pdf
    • https://cdn.shopify.com/s/files/1/0433/9849/6412/files/ode_to_autumn_poem_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0436/7548/4313/files/ponevutikawowizisuse.pdf
    • https://cdn.shopify.com/s/files/1/0432/4691/1643/files/66270318855.pdf
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/e_coli_bacteria_in_water.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/japemaleloxupi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4655/8106/files/48544656131.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/wefivexiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5029/files/58906785591.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zijilo.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_off00006240.bin
158ca15eab6d42b1da63787707890b3da6d0db186bd94404960ddefb47bb3e5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 5508 bytes
font_01_sfnt_off000074ef.bin
ea4c8baa92746b684887e9795ca3fd0850caeb1d91c7ef51899bfc24658fe43b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EF 10632 bytes

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