Malicious PDF — malware analysis report

Static analysis result for SHA-256 018eb0382af31e91…

MALICIOUS

PDF

69.4 KB Created: 2020-08-12 02:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7b8a6bfe66b6ac8f2fc8f474491965b SHA-1: aff9bfedee6a62dd969f895744286ebc0a6986fe SHA-256: 018eb0382af31e91fe60f5ba5763b77c641efca40874eded4002cac83b4e2009
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, includes text related to a book title and the wkhtmltopdf application, suggesting a lure. The presence of numerous external PDF links further indicates a link farm or SEO spam tactic, designed to drive traffic to malicious sites.

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=el+compendio+del+catecismo+de+la+iglesia+catolica+pdf
    • http://files.jaclynweist.com/uploads/1/3/0/7/130775375/c1821dad29.pdf
    • http://files.genyablake.com/uploads/1/3/1/4/131407655/zoxovitimut.pdf
    • http://files.diamondautousa.com/uploads/1/3/1/3/131398385/1472775.pdf
    • http://files.yehudiwyner.com/uploads/1/3/0/9/130969545/3d315d757a26db.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/8258/7037/files/accounting_theory_and_practice_michel_glautier.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/59586251831.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/suwareguzetod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5391/6060/files/titumadobeligirid.pdf
    • https://cdn.shopify.com/s/files/1/0428/2040/3356/files/pivew.pdf
    • https://cdn.shopify.com/s/files/1/0437/5710/9402/files/volare_chords.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7082322425.pdf
    • https://cdn.shopify.com/s/files/1/0434/8870/6717/files/92266567603.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/cad_welding_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/zesopikipokuxevoxuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/4914/7816/files/68296156400.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/rimomepusupepip.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/58708711358.pdf
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/ibps_rrb_notification_2020_syllabus.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_off0000c0c4.bin
78b9d1b084e473c5b88b5bd0fb9177d7ee4e6edc70a5b026413a33038b4f96ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C4 5124 bytes
font_01_sfnt_off0000d212.bin
60838fbfaea64cb5a88ff66ddfb59cb9d0b95032d98aabfdc7b08ca550d74b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD212 11708 bytes
font_02_sfnt_off0000f7e3.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E3 4324 bytes

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