Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37da2a1d88c409b…

MALICIOUS

PDF

43.6 KB Created: 2020-08-21 08:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5aa349b126a08fc11dfcb0fe6b872f24 SHA-1: 718c2615fa0ed29ca3afde71a034b3d4515f2105 SHA-256: b37da2a1d88c409b0f6917468fd3a507c46559e77fefb87b73ec744b4030cfbc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is likely used to funnel victims to malicious sites. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, with one prominent example being a Shopify-hosted PDF. The document body contains garbled text but includes the same malicious URL and a reference to 'wkhtmltopdf', suggesting it was generated by a tool. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=heropanti+full+movie++720p In PDF document text
    • http://files.parkelitesports.com/uploads/1/3/0/9/130969690/1787151.pdfIn PDF document text
    • http://files.alpinespringscounseling.com/uploads/1/3/1/0/131070011/marisipitigurarero.pdfIn PDF document text
    • http://files.tamaraturnbeaugh.com/uploads/1/3/1/4/131452903/9530362.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9820/0481/files/13385234942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0998/1085/files/13471625827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4716/4840/files/god_bless_america_sheet_music_for_trumpet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/cdisc_sdtm_controlled_terminology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/64813203277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/rawuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/zidatavuwurikuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6939/9452/files/99807106506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/atomic_structure_and_quantum_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/kaxugavegel.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D39 5244 bytes
SHA-256: cdaeaaa46ec8f84a25104e731d0caaec8cfb1bbd8508055e84790794f5e948e7
font_01_sfnt_off00005f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F04 10116 bytes
SHA-256: c7d8c453ad1b3c5790e0ea09f00b42f13d13b400e23c0f261b79295afa6e3730
font_02_sfnt_off000081e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E5 18776 bytes
SHA-256: 1df41416ece054d3cca32f135e48dc95f4d9c8a2bff4ba4edba1d14e21aabef6

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