Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fee9f2be47d1f5d…

MALICIOUS

PDF

106.6 KB Created: 2020-09-08 22:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a180da92f2d20974597ef78909faa3cb SHA-1: eaee90a4dabdf4c3f72fa988897b7c2349250288 SHA-256: 5fee9f2be47d1f5d0eb74177e4d3604794b1cddf19a675414506f7ab8a6d22c7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a malicious redirector and part of an advance-fee scam. It embeds a link to a redirector URL, which is likely used to lead the user to a malicious site. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The presence of embedded PDF link farms further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.me/wix?keyword=transformers+2007+bumblebee+captured
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/9938/1157/files/kefifarozavi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7807/1960/files/holt_english_textbook_11th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/nozivagowuniraweziwos.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9606/files/pukatisomaxixeselagesowil.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/58560145598.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/ansar_vdp_circular_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/4962/3462/files/39861982776.pdf
    • https://static.usrfiles.com/ugd/c8df25_fcddacc0389745499d84fa5b50118f0b.pdf
    • https://static.usrfiles.com/ugd/5bb01c_a5cc7b87b72145cca78a91d8336d8365.pdf
    • https://cdn.shopify.com/s/files/1/0438/8500/2920/files/zegafesamidifunitowekeba.pdf
    • https://cdn.shopify.com/s/files/1/0435/1049/7434/files/biometric_residence_permit_card_application_form.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015717.bin
ae7263d05becaabd29c9c31a9cb072574207763811909f4dd6e68182f13b0339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15717 5576 bytes
font_01_sfnt_off000169e9.bin
f16514573374fdec46cf1b93c62ed7affde40610e794959ebc10036f3dd2c36e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x169E9 11092 bytes
font_02_sfnt_off00018f3f.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18F3F 4324 bytes

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