Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c0b9e2d5124fd1…

MALICIOUS

PDF

41.9 KB Created: 2020-08-23 17:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3f3eece1eed40ff1b5d0032a48570b SHA-1: f8919e78ce459cb58fe56f29f579ee159c96c324 SHA-256: 02c0b9e2d5124fd19e15444b47dba01d239333a4a1cb254d12be0faeca3110cd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination. 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.com/pify?keyword=beard+cut+guide
    • http://files.pietowndesigns.com/uploads/1/3/1/4/131453541/3126721.pdf
    • http://files.theexoticanimalencounter.co.uk/uploads/1/3/2/7/132712139/wolimixofu_mexelap_girapitavatogu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4842/5889/files/turitex.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4344/files/pezobowurijigejegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0301/9427/files/insomnia_movie_480p.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/60801337734.pdf
    • https://cdn.shopify.com/s/files/1/0436/3429/4937/files/bossa_nova_guitar_lesson.pdf
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/nutrition_du_sport_formation.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9018/files/88917986581.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/70425587890.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3904/files/sobisuso.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_off0000671c.bin
88c059a9a43c2d44b2a357e878c26e39e923bcd4754446bc0f6b3ee96a25cc08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 4944 bytes
font_01_sfnt_off000077f4.bin
b0b627dc009ca927c8e4125d44f94658e4321f1bf4460f0f1027e316823cba68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F4 10388 bytes

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