Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af73da821ce30c5…

MALICIOUS

PDF

38.7 KB Created: 2020-08-09 15:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbe3d8f62a85c85985dfc266a6b2778e SHA-1: 76d521f3df182c568577347d568aeaa4e6b6b8e9 SHA-256: 0af73da821ce30c58b2f682e77ae1cdc5031f2afd5d9128a58d5526a81c52569
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=canny+edge+detection+matlab+code+pdf, which is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious activity as legitimate content.

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=canny+edge+detection+matlab+code+pdf
    • http://tawudino.sabco.org/uploads/1/3/0/8/130873995/b2e02e1cb22d3a.pdf
    • http://venagur.harpendenphotographicsociety.co.uk/uploads/1/3/0/8/130873851/d0015.pdf
    • http://files.joellecreates.com/uploads/1/3/2/6/132682655/0489dea60de8d.pdf
    • http://kajolife.northrydebeautyandspa.com/uploads/1/3/1/3/131381428/35df98803a0f0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/pawoturebedagixubid.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/sobofogalag.pdf
    • https://cdn.shopify.com/s/files/1/0446/7235/2419/files/poe_chaos_orb.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4669/files/biblioteconomia_libro.pdf
    • https://cdn.shopify.com/s/files/1/0437/6936/4632/files/sprouts_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/sinozuzusuwajev.pdf
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/microeconomics_robert_pindyck_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/tapaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9888/1704/files/tekawemuzegogaragazewuw.pdf
    • https://cdn.shopify.com/s/files/1/0439/0925/1227/files/pabenowitesosegupajon.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_off000058ad.bin
462c17e9404d5780585aa45e6d80c6dc9d7757d821fcecf21afffe57d359a5a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x58AD 5348 bytes
font_01_sfnt_off00006ae0.bin
d1ecc3d046581c46e7203604351ae9bd2852224167c36d8048f0e7baf70ef27c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE0 10276 bytes