Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28ada9f733e22c1…

MALICIOUS

PDF

55.0 KB Created: 2020-08-23 11:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74c835d76075c5edac2a7daf2e6e71e5 SHA-1: 769a713cd6de96bcfd60db184dabab2e54756f7f SHA-256: b28ada9f733e22c148b9b323eb45841ed1cec24526472c8181cc5282dd75768e
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a lure related to educational materials.

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=tenses+worksheet+for+class+6+with+answers In PDF document text
    • http://lazeve.paranormalread.com/uploads/1/3/1/8/131856158/gosak.pdfIn PDF document text
    • http://files.shiragirlschoir.org/uploads/1/3/2/6/132682048/zidol.pdfIn PDF document text
    • http://mifajesun.naturallyliterate.org/uploads/1/3/1/3/131380600/fuxudeju_jagiti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/wasanezilesovoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/96408056550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/26898014345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/89012742027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3011/6509/files/platform_games_online_adventure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/64838137158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5453/8656/files/baldi_basics_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2375/1575/files/depression_screening_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/alliance_x_empire_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27392185694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/31905796525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66656561998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/nadesofimikaber.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 7

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_off000082dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82DD 5016 bytes
SHA-256: 7d7de26f96191a424961e06a8bdd3aef415d40fd5d5f116dc3989080f164e3ae
font_01_sfnt_off000093ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93EE 14420 bytes
SHA-256: 2c437cfb7fbda85e04c9619f8ac06eb469e6c3d936542ee23d924e02cc5d6a09
font_02_sfnt_off0000c0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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