Malicious PDF — malware analysis report

Static analysis result for SHA-256 136ea2ae5e519c68…

MALICIOUS

PDF

46.6 KB Created: 2020-08-09 15:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 116e69939cbd3e1212eca31bb68e9b06 SHA-1: 219ca87e339501284476a6774056710c3bb21d3f SHA-256: 136ea2ae5e519c68f5480e7226199c774c150ce8d06f06bd652c6a472663f281
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links directs to a known malicious redirector, 'ttraff.ru', which is likely used to obscure the true destination or for traffic monetization. The document body, though partially corrupted, contains text related to 'lighting for cinematography pdf' and references wkhtmltopdf, suggesting it was generated programmatically to appear as a legitimate document while hosting a large number of outbound links.

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=lighting+for+cinematography+pdf
    • http://files.elitestreetwear.com.au/uploads/1/3/1/4/131455680/5d5ddcb.pdf
    • http://files.ladywellterrariumcompany.com/uploads/1/3/0/9/130969154/a8b1f11141.pdf
    • http://files.drtonicamacho.com/uploads/1/3/1/4/131438313/nekisigiwu.pdf
    • http://files.chriscooperart.co/uploads/1/3/0/8/130813466/givujefelob_wadoviga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/attachment_theory_adults.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/jubiwateza.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/vopob.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/waxevuge.pdf
    • https://cdn.shopify.com/s/files/1/0430/7048/8730/files/naredonukamepozufevem.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/xesogefujadojepaxawudivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0859/7927/files/fallout_4_ammo_codes.pdf
    • https://cdn.shopify.com/s/files/1/0430/0380/5847/files/lekufo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/60101980612.pdf
    • https://cdn.shopify.com/s/files/1/0438/2860/9186/files/bhilwara_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/4394/5628/files/922419354.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_off000079b0.bin
cb1a2975005bbc6bce669cb96835c0fbf5be23d05865d280016cf733c7db9f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B0 5404 bytes
font_01_sfnt_off00008bf9.bin
dbfe0d79070be5c75cf1b637a99bed7c904d95fc1588c017e216a30dafa14311		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF9 9964 bytes

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