Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab01767def981f16…

MALICIOUS

PDF

43.9 KB Created: 2020-07-10 11:30:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eecd299a21406faccfac77127a18ca74 SHA-1: 1132c88d669e81edb41aff039dc648e492b329cb SHA-256: ab01767def981f166511b6566b834f281f65906fc6138f1d9554dfb2731ca0c8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, forming a link farm. One critical heuristic identified a redirector link to 'ttraff.cc', and another flagged the document as a 'PDF_SEO_LINK_FARM' due to the mass of external PDF links. The document body contains text related to lyrics and chords, likely a lure to disguise the malicious intent of distributing numerous other PDFs.

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.cc/wb?keyword=shepherd%20of%20my%20soul%20lyrics%20and%20chords%20pdf
    • http://files.kafyeblaan.com/uploads/1/3/1/8/131856381/becb5.pdf
    • http://files.companionsofchrist.org/uploads/1/3/0/9/130969375/3234800.pdf
    • http://files.nphsjrwolfpack.com/uploads/1/3/1/4/131483253/pageponiputi_gosalobire_vopepas_fatibo.pdf
    • http://files.barefootlaneclothing.com/uploads/1/3/0/9/130969710/1791883.pdf
    • http://files.blueghostbrewing.com/uploads/1/3/0/8/130814157/fenumedul.pdf
    • http://files.agbcontracting.com/uploads/1/3/2/7/132712514/2125422.pdf
    • http://files.dannywindsor.com/uploads/1/3/2/6/132681325/toroduj.pdf
    • http://files.albertadachshundrescue.com/uploads/1/3/1/8/131871480/7916040.pdf
    • http://files.nwhsmsa.com/uploads/1/3/1/4/131453394/6048355.pdf
    • http://files.churchesreachout.com/uploads/1/3/1/4/131454692/5168231.pdf
    • https://mokelim.files.wordpress.com/2020/06/gowadozevawo.pdf
    • https://jufenex.files.wordpress.com/2020/06/40963376301.pdf
    • https://jozenomo.files.wordpress.com/2020/06/mizulake.pdf
    • https://kegitemowe.files.wordpress.com/2020/07/xuzejalam.pdf
    • https://vosonowa.files.wordpress.com/2020/07/9307786914.pdf
    • https://xapowiboz.files.wordpress.com/2020/07/31607443702.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41758367329.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39748763391.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19085525902.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/49090326843.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wevola.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28068876324.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_off00006579.bin
6517e5552313710b4f396f11388fa035e58a208d4bf02812fc1b1523ec705dbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 5400 bytes
font_01_sfnt_off000077ab.bin
96d59e6e97c73e989d7575794c61eab4e887648e159290f60bc4d09e697941fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AB 13432 bytes

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