Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0439587e91816d…

MALICIOUS

PDF

44.5 KB Created: 2020-08-23 11:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5ef6bfaf79e9a56a9d3ee6240a4f617 SHA-1: 395a2bcf941ea6292756cbd5963f11348f9c66dc SHA-256: 0e0439587e91816d5c7baea200d86d63d7fc33ae519360b5b7046d6d75f49b91
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The document body, though partially corrupted, contains the same URL found in the redirector heuristic, suggesting an attempt to lure users to a malicious site. No scripts were extracted from this sample.

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=frette+hotel+classic+collection+sheets
    • http://poxuvelex.rosyhuephotography.com/uploads/1/3/1/3/131379641/ada688.pdf
    • http://files.pokebattles.gfx-pro.net/uploads/1/3/1/3/131381612/buravenoxobumi.pdf
    • http://files.ncmarinedebrissymposium.com/uploads/1/3/1/8/131856646/sezuseju.pdf
    • http://negal.drjenniferawe.com/uploads/1/3/1/4/131438500/f16dfb010.pdf
    • http://files.juliamarieyoga.com/uploads/1/3/1/1/131163693/ruretu_gitafu_jibaxapa_pekowemafibine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1055/5034/files/xowotek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1553/files/25771526049.pdf
    • https://cdn.shopify.com/s/files/1/0448/6260/3426/files/panukugipibodawabolanemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0904/files/9627238400.pdf
    • https://cdn.shopify.com/s/files/1/0429/0710/7495/files/who_killed_amanda_palmer_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/50842393573.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/babomusad.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/fovazegafiruzi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1905/7826/files/2099855398.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/9867410632.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/enable_ip_routing.pdf
    • https://cdn.shopify.com/s/files/1/0437/9344/9122/files/xuvapemidonazekale.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_off0000614b.bin
2bcbd45ce9c477b10a191cd195cb39db2a6159cbc42d25cedf1eab0134d9371c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x614B 4632 bytes
font_01_sfnt_off000070f1.bin
471625cc4c79e5f42476f4dd5d75d3e80f24b90ac432dbb121545572b44d2e85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F1 11120 bytes
font_02_sfnt_off0000969d.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x969D 4324 bytes

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