Malicious PDF — malware analysis report

Static analysis result for SHA-256 553a968b5636464f…

MALICIOUS

PDF

33.4 KB Created: 2020-08-11 16:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: adfaaaa13d3f275ceeae92b1f4cb033a SHA-1: d5c3f82cc6db3ddee9a44397701e40612ff93160 SHA-256: 553a968b5636464f9401ca70069085d4291da362760902816bbb90e9ed016680
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at ttraff.ru. The document body contains garbled text but includes the same redirector URL, suggesting an attempt to lure users to malicious infrastructure.

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=ibanez%20chorus%20flanger%20cf7%20manual In PDF document text
    • http://files.dotterwood.com/uploads/1/3/1/1/131164351/bijafibe_lewifamukujus_gurim_momem.pdfIn PDF document text
    • http://verabiza.jlizjewelrynmore.com/uploads/1/3/0/8/130874429/18ac78b8da.pdfIn PDF document text
    • http://files.abnormalhunter.com/uploads/1/3/1/0/131069934/3672325.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/1/0431/4074/3330/files/jijalixoberagebol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/69981575049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9078/8000/files/sap_project_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/32756481239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8873/1546/files/puvabisadukeratamoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5430/8245/files/sway-_cdn._com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1185/0918/files/48933729229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0090/5380/files/zipibexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5318/7221/files/non_enzymatic_browning_reaction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wopeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/vowels_and_consonants_worksheets_for_kindergarten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2338/4219/files/36104203808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9992/1315/files/fiviripogiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/93031390959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3846/4405/files/reduced_adverb_time_clauses_exercises.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 4

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_off000044e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44E2 5504 bytes
SHA-256: 9d5c641b66e943a61d39ae3e93125781dc3a35389ed04726753fe838cb15b27d
font_01_sfnt_off00005777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5777 9752 bytes
SHA-256: 5d8517fba5cb177d420655570fdcdb52262fecf3b541d7acf8e4ff0abfec7009

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