Malicious PDF — malware analysis report

Static analysis result for SHA-256 720c39fd47c92401…

MALICIOUS

PDF

144.9 KB Created: 2020-08-10 08:31:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c851d6b21baf0409fb5004dcfe68e704 SHA-1: 6b54560265057f10f01e8362dc93b765c6b42c30 SHA-256: 720c39fd47c9240112fd5d5e980168e0ca6a61a6cecb582953666c0dc8024496
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The PDF also contains a large number of external links, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=carbon+cycle+test+pdf
    • http://files.thewolversdeneclub.co.uk/uploads/1/3/1/8/131856050/zarakutilup-dodanepapedelu.pdf
    • http://files.offshorehd.com/uploads/1/3/1/8/131871621/zezefokizupuzi.pdf
    • http://xexusuwo.hopkinton-sepac.org/uploads/1/3/1/4/131453041/9148437.pdf
    • http://files.goldrushdispensary.com/uploads/1/3/2/7/132740638/62e9b.pdf
    • http://files.drescher.photos/uploads/1/3/0/7/130776182/d6b49287a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/xewomiselukutesulobof.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/chander_pahar_book_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0437/9341/6349/files/zopomosuwodusogapasa.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/wefataka.pdf
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/82858756127.pdf
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/7195207302.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kekesapenogetiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/foxunakisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdf
    • https://cdn.shopify.com/s/files/1/0429/3050/3843/files/kisofupebesalosasa.pdf
    • https://cdn.shopify.com/s/files/1/0439/4542/7102/files/mekofexusajizan.pdf
    • https://cdn.shopify.com/s/files/1/0432/8321/8600/files/bomuroxexonirotobus.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_off0001f1c5.bin
77c851cc110e39ca581abaa6a3f3020bd4aa1f3befd21732c8de2c236350d299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1C5 5152 bytes
font_01_sfnt_off00020359.bin
3d6097fda2d3268dd5ded4585486c28728f015e6b0c0f6aadf2ae635b1f77323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20359 10912 bytes
font_02_sfnt_off00022815.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22815 4324 bytes

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