Malicious PDF — malware analysis report

Static analysis result for SHA-256 64607a2b7b676503…

MALICIOUS

PDF

44.7 KB Created: 2020-08-07 08:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8e0bb75312314e7ec19f0cc8f8353ec SHA-1: 7632ff216e510c3192d565a07cc9478c6284bffd SHA-256: 64607a2b7b676503a1235448dbd7d4e34863342b8a7c335582c50e8b11c5ba42
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify-hosted PDFs. The ML classifier strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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.com/pify?keyword=associer+plusieurs+pdf+en+1
    • http://files.autismhomebase.com/uploads/1/3/1/4/131453022/4080800.pdf
    • http://files.vocalsinworship.uk/uploads/1/3/1/3/131380995/xerapisu.pdf
    • http://files.josepblas.com/uploads/1/3/1/4/131437268/kiwinorubidosa.pdf
    • http://files.aboutlightimages.com/uploads/1/3/1/3/131380445/mokurojofemiro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/suxivoletapabemagifarito.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/38944894292.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/25561279180.pdf
    • https://cdn.shopify.com/s/files/1/0440/5349/5958/files/45497278198.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/zukopatanokowurumaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/67438209215.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/34321096191.pdf
    • https://cdn.shopify.com/s/files/1/0431/6741/6488/files/32065372914.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/30198473276.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1752/files/escenas_de_la_vida_posmoderna_beatriz_sarlo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5838/0446/files/cause_and_effect_worksheets_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0433/6415/5560/files/tinogopidovero.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/nofimigisaku.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_off0000707e.bin
29238dec67ac7ab57af4e24f0d5fa438934ab0ec44ebb6f1ea913c72a07d3fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707E 4980 bytes
font_01_sfnt_off0000818a.bin
985ee3fe8f58a0f5a1aac734fcfc96b3f4e156a0853a614fd4aadcd4a85b4b20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x818A 11668 bytes

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