Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b67921f9c7b3c52…

MALICIOUS

PDF

41.2 KB Created: 2020-08-24 06:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 925f8b1b115bef1d770c2513933ed34b SHA-1: 43fcccc3f12376d7b5219fab7ae29b658eb80b68 SHA-256: 1b67921f9c7b3c52d9ec39240b55fbe68efe4c2b560d86d565edd71dddadd037
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=energy+pyramid+worksheet+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector. 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=energy+pyramid+worksheet+pdf In PDF document text
    • http://files.loveayianapa.com/uploads/1/3/1/3/131382955/4308416.pdfIn PDF document text
    • http://files.coyleband.com/uploads/1/3/1/4/131438840/45babf0ea4e6ba9.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/1/0428/7424/1187/files/29504948688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/nagotawar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2579/1133/files/ncaa_basketball_court_dimensions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/70401485933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3974/2359/files/35508978238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/totozovuwazux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/relidevapejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/88016325336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/8959/5287/files/kawasaki_z900rs_performance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/creative_brochure_design.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_off000061ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CA 5640 bytes
SHA-256: 2065275dbabde15eeefd5563c403e097951ab095946bd2c892d1d7d2e8a46fb3
font_01_sfnt_off000074e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E5 10364 bytes
SHA-256: 4f07e903d3d639ca59e8081b4867d22ac91e7f9b2566033bd5244a1f7b0632e3

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