Malicious PDF — malware analysis report

Static analysis result for SHA-256 060e7a2f174e6b38…

MALICIOUS

PDF

37.7 KB Created: 2020-08-09 09:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4dd853fae73fcadeb090d9e57721156 SHA-1: 9dc2c2012aba05dc760d6b1d4abb039a819ce00b SHA-256: 060e7a2f174e6b3899147c24a5a5f9ea5c5811ed9fefc44e606f5659eea63c60
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection attempt. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=rogue+character+sheet+5e+pdf`. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to "rogue character sheet 5e pdf" and the authoring application, which likely serves as a lure.

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=rogue+character+sheet+5e+pdf
    • http://files.richardblakeweddings.co.uk/uploads/1/3/0/7/130738928/gopazotaketuwopokave.pdf
    • http://files.montclairschoolsdata.org/uploads/1/3/2/6/132681194/2093328.pdf
    • http://files.socialplannerevents.com/uploads/1/3/0/7/130775698/rugesufi.pdf
    • http://files.aleonor1to1.com/uploads/1/3/1/0/131069812/5239366.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/24272500590.pdf
    • https://cdn.shopify.com/s/files/1/0432/3655/6962/files/92344816657.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tozonolemudafolafoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9856/1957/files/money_banking_and_finance_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7417/files/kakaxum.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/bugaxugebosepubopekuvox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0121/6163/files/74966318793.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/4535637811.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/gigeneta.pdf
    • https://cdn.shopify.com/s/files/1/0432/0762/2817/files/temikanugotadarimoxomeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/7411/7018/files/kayla_itsines_recipe_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4745/files/zovaju.pdf
    • https://cdn.shopify.com/s/files/1/0431/9713/7056/files/4023789078.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_off000054e4.bin
50ebea8a5fe680777274514aadfb6e700a9106707dc07abec1c0e7ba928f66a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E4 5516 bytes
font_01_sfnt_off000067b3.bin
e0bfde5f2af1e076fc3e3a1df43780d8051f585991e3ff3eaae5222f1edf1ad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B3 9908 bytes

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