Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fce1635c4edd8f…

MALICIOUS

PDF

43.4 KB Created: 2020-08-14 20:41:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7eab8d89160b4796b7b697cf367974cc SHA-1: b6411ce8f3c7d267fa6511122996b7cc7c9318e0 SHA-256: 06fce1635c4edd8faa73b75e9f8cfc98ab2c64f9412049e6665d14cefe24120d
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one prominently leading to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Avast antivirus license file free', suggesting a lure to trick users into clicking the malicious link. The presence of many external PDF links also indicates a link farm, a common tactic for SEO manipulation or distributing 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.ru/pify?keyword=avast+antivirus+license+file+free
    • http://files.okaypanic.ca/uploads/1/3/0/9/130969151/f6cec409bf50858.pdf
    • http://files.genuinely-younique.com/uploads/1/3/1/0/131070476/juxosaj-zukujise-bejusefive-jonodilunaf.pdf
    • http://files.olneyhelp.org/uploads/1/3/0/8/130813796/wetodik.pdf
    • http://nojexavo.monitheseries.com/uploads/1/3/1/8/131856158/318ca7.pdf
    • http://somegi.eatplaywed.com/uploads/1/3/0/7/130738902/masufo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5604/7004/files/84956022085.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/fulujupeworividiwodub.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/68862989803.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/56248615377.pdf
    • https://cdn.shopify.com/s/files/1/0431/0394/4858/files/29377029989.pdf
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/gafoxusexidimasalemepas.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/geneku.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/staff_observation_aggression_scale.pdf
    • https://cdn.shopify.com/s/files/1/0431/4300/4322/files/wopavarovanewixulemabij.pdf
    • https://cdn.shopify.com/s/files/1/0440/7663/0181/files/wuwuvopikofidurewusunara.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/22349489913.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_off00006c5b.bin
6440764af60994674fbbb0f20c895d04ac33a93f031557ac2cd0deb6de45bd14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5B 4924 bytes
font_01_sfnt_off00007d24.bin
ff9cbba8a8f5e780608745338e19274890d7565ee2e3c98d4c68883102ac3324		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D24 10192 bytes

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