Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ddd2255138e152…

MALICIOUS

PDF

39.6 KB Created: 2020-07-24 20:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 41044845ef94f011c1e50b518f66e554 SHA-1: 53cecab98970a32a8ab70f841e1c572bb09c8854 SHA-256: 83ddd2255138e152fa801053a29a09c4f02adb29b73cf7b275a9e3cfe82cb991
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, specifically pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains text fragments that, combined with the heuristics, suggest a lure for phishing or malware delivery. The presence of embedded URLs and the ML classifier's high confidence further support a malicious classification.

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=axilla+plural+form In PDF document text
    • http://files.mindfulnesstrainingsrc.com/uploads/1/3/1/4/131407012/zuterunijawive.pdfIn PDF document text
    • http://files.nickskitchendalycity.com/uploads/1/3/0/8/130874668/zaxukebebow.pdfIn PDF document text
    • http://files.ivfround.com/uploads/1/3/1/4/131438289/xulesolito.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/1/0431/5388/3293/files/rolisiliketa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/36297184735.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/nadabewewinoritopiwola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/jukinedopulowenajupat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1274/2550/files/95160555932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/14036667614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/soworavate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/86034277271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5308/8921/files/56945987444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/zewexatitoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/guwisufanujuxuxudixiwuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/zafajilatifelu.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 5

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_off00005fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC1 4504 bytes
SHA-256: 7afb07f442eea8251ffe27ba82abbde905547a65aac423ea15d97e5a9c945b39
font_01_sfnt_off00006f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F04 10196 bytes
SHA-256: b6ffe080b2aef3a4c9b43b092c932d45739053545036a017b7bdf82a17074962

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