Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfe801ebd5dd1ff…

MALICIOUS

PDF

58.3 KB Created: 2020-08-15 05:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14c52bc6d4176525b6a58027b3c6911f SHA-1: d2fcbd58b40fd2412ed92769fac468fde4051fe6 SHA-256: bbfe801ebd5dd1ff003e0b7d63292943bb38f1feb62a35686101d1a18616ab1b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a large number of embedded links to external PDF files hosted on platforms like Shopify, indicating a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through these links, with 'ttraff.com' being a high-priority IOC.

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/wb?keyword=glandula%20pineal%20funcion%20pdf
    • http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdf
    • http://files.speckmath.net/uploads/1/3/1/4/131437666/daxomixolosotenon.pdf
    • http://files.ugascienceolympiad.net/uploads/1/3/1/3/131382030/dedufiremagozo.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/mijokurunebuwaju.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6525/files/88610097209.pdf
    • https://cdn.shopify.com/s/files/1/0446/1314/0643/files/95782284379.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/93158622210.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/mowosaxuxitilegodigopevif.pdf
    • https://cdn.shopify.com/s/files/1/0434/8290/6789/files/learning_python_o_reilly_6th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/calendario_escolar_2020_y_2020_sep_185_dias.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/7105545514.pdf
    • https://cdn.shopify.com/s/files/1/0435/5109/6984/files/semotutowejebajeva.pdf
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/58159749524.pdf
    • https://cdn.shopify.com/s/files/1/0438/2759/3376/files/bmi_calculator_chart.pdf
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/36746528046.pdf
    • https://cdn.shopify.com/s/files/1/0428/7676/4327/files/76692279311.pdf
    • https://cdn.shopify.com/s/files/1/0431/1685/5453/files/jovix.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a5f4.bin
411e193dec2580a4a5f18477bac2a18c9e69c8a53e8af946264515b87217fb4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5F4 4908 bytes
font_01_sfnt_off0000b6be.bin
80d50ee865500a100f680176eb99ddc393f1fabb65ce54fca5b8309727048abd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6BE 11100 bytes

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