Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2b66690ca5bda70…

MALICIOUS

PDF

45.2 KB Created: 2020-08-15 03:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20191d9244780c046a946284bc79bb76 SHA-1: f0f298855977af723b0b8bd41fe0b634e8adcaf0 SHA-256: b2b66690ca5bda705a2558663c80f4f8b707a38ba30cb89d84005001b4d9e5bf
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One of these links, 'https://ttraff.ru/wb?keyword=german%20language%20study%20guide%20pdf', is flagged as a malicious redirector. This indicates the document is likely part of a phishing or malicious redirection scheme, aiming to lure users to harmful content.

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/wb?keyword=german%20language%20study%20guide%20pdf In PDF document text
    • http://files.forestveterinaryclinic.com/uploads/1/3/0/7/130776089/edff0.pdfIn PDF document text
    • http://files.adyartcenter.com/uploads/1/3/1/8/131871690/fawakaw_wuwakumoxag_zexadiru_zajuw.pdfIn PDF document text
    • http://files.ivisionrealty.com/uploads/1/3/0/7/130775825/ee7e04e2a415.pdfIn PDF document text
    • http://files.cpccedu271.org/uploads/1/3/0/7/130775084/2055206.pdfIn PDF document text
    • http://files.chrislewisjonesartist.com/uploads/1/3/1/3/131384573/78ae51ecae8db.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/1/0432/0700/0219/files/jolimebezatixowes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5153/9861/files/nirujozitawebikokijufix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4985/6669/files/36701386832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/39637284506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/32853761312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/9518080242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1347/9320/files/gazawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6558/1469/files/kolagogomodup.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 6

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_off00006a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A36 5496 bytes
SHA-256: 61c4c5c38ac06babfb43a33bd416c1ec1c629c41c89153b4657626f5cc3a0a18
font_01_sfnt_off00007cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD8 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00008565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8565 10016 bytes
SHA-256: b5134baf3d63383fc0cf445d471418da0aff925ae90bf19870ea182ee1124be4

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