Malicious PDF — malware analysis report

Static analysis result for SHA-256 64268f9b1d5f9bc8…

MALICIOUS

PDF

44.6 KB Created: 2020-08-08 15:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 628dc983b4da1c0138749c40df1ff746 SHA-1: 4252ed28588e65028a9b042fae608202bcc88df7 SHA-256: 64268f9b1d5f9bc83e7a431639553e7e44521b6c35245aa019fa4a76cef531de
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that, combined with the heuristic 'SE_ADVANCE_FEE_SCAM_LURE', indicates a scam attempt. The presence of many external PDF links suggests a link farm designed to attract victims to malicious content.

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.com/pify?keyword=adrian+paenza+pdf
    • http://files.whatsjordaneaton.com/uploads/1/3/1/0/131071137/0f857c6.pdf
    • http://files.shadowwind.org/uploads/1/3/1/3/131398164/mebasonogivu-sijagagez.pdf
    • http://reluvuzuv.taichirutland.com/uploads/1/3/1/4/131437987/c93d6d1254d8.pdf
    • http://files.sunshinecanyondogrescue.org/uploads/1/3/2/6/132695554/zolakovirutazop-madomove-dejeg-lefiruk.pdf
    • http://romudo.riverrockgems.com/uploads/1/3/2/7/132712615/bapub_ropoxebus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/rizujosena.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/moweludobumopivevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/66056593513.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2261/files/luxevumarejazulewimaban.pdf
    • https://cdn.shopify.com/s/files/1/0437/9518/5824/files/82640557546.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/capitalismo_gore_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/bunebawete.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/66509301532.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/lamuponodi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0982/4152/files/lebakamuxubukanu.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_off00006600.bin
fb6a7a85021d4b3768e18ac08c76b8338210289d9b6251618e7046673b8a1fdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6600 4464 bytes
font_01_sfnt_off00007527.bin
c92d29d5f33a1dacd5338cc2ed81514d0f75dac1814117a813d7a0e4f0a3022c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7527 10052 bytes
font_02_sfnt_off0000978c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x978C 4324 bytes

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