Malicious PDF — malware analysis report

Static analysis result for SHA-256 94239a8c8495c9a5…

MALICIOUS

PDF

41.2 KB Created: 2020-08-10 15:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 339f31f3e4f80dc0a8cb5f6366456d89 SHA-1: a2d09200c094025de0b7e375eec4cd9f6c7b791e SHA-256: 94239a8c8495c9a5052b7944a65b3f0ce6e640e7bf90e4768f4f0359565820e5
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body and embedded URLs reveal a large number of links to external PDF files, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. One of the primary links points to a redirector on 'ttraff.ru'. 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=los+5+acuerdos+toltecas+pdf In PDF document text
    • http://dewata.cottageforrentontario.ca/uploads/1/3/2/7/132710703/miribobezuxi.pdfIn PDF document text
    • http://files.bethanyclarephotography.com.au/uploads/1/3/0/7/130775172/4718640.pdfIn PDF document text
    • http://files.eestilodevida.com/uploads/1/3/0/8/130815009/pejotopezude.pdfIn PDF document text
    • http://files.fattsoonkueh.com/uploads/1/3/1/3/131379844/a610f25.pdfIn PDF document text
    • http://files.rchalaplaya.com/uploads/1/3/2/3/132303068/jobijoxalutulud-nazuge-lusewozojamanak-boxitegevelirob.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/1/0428/4612/6247/files/62467622957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4880/3227/files/gajesisaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1620/9059/files/iodine_value_calculation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/pivexexodefuzigakijexiguz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9288/files/zuduluv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1524/1891/files/nofofijuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/64995906919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/variable_costing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1946/7943/files/32205259702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/vijufezik.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

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000605b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x605B 5212 bytes
SHA-256: d336082b8bafd2bcbaca104a3ba501a98c2a395b64d460e4aa5ba43a190803f8
font_01_sfnt_off00007227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7227 11248 bytes
SHA-256: 08df95d44605650764d370fb7116744b08142f1e66ba80822abe803aa8306bba

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