Malicious PDF — malware analysis report

Static analysis result for SHA-256 8640f693ff2bea28…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 11:17:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9687a4f939453ccbc34fefbf3401c3e3 SHA-1: 07fb564cee56e3be3c2486b7be366da5be0ad9fb SHA-256: 8640f693ff2bea289b618c6c80fb1ec5b627666c58acfe151237803807da81eb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.ru/pify?keyword=developing+android+app+python'. This technique is often used for SEO poisoning to lure victims with search engine results. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a phishing or scam attempt.

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=developing+android+app+python In PDF document text
    • http://files.thecastlespa.co.uk/uploads/1/3/1/4/131407802/bositoliluw.pdfIn PDF document text
    • http://files.rangelandwildlife.com/uploads/1/3/1/4/131438448/turesofu-molodixuxefi-suloduwo.pdfIn PDF document text
    • http://files.luciadisanto.com/uploads/1/3/1/0/131069789/9563369.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/1/0429/1425/0905/files/28227027461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2210/6269/files/9085445642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8612/4958/files/adjacency_list_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/weight_loss_exercise_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5893/2381/files/pokesonuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4015/2475/files/31045018908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/pandas_to_csv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5026/9849/files/83347139873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/dududevuroxuwatusaxib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/7453/8920/files/jahiem_the_makings_of_a_man.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 8

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_off00005ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED4 5204 bytes
SHA-256: d0937cf45fed51c415d93993556d7eb69987316d630147982311863852c83ac6
font_01_sfnt_off0000708e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708E 10148 bytes
SHA-256: f8482ab0c7b82ec632527767fd9401c8b16dc1532653c93d335e618349a7c1d2

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