Malicious PDF — malware analysis report

Static analysis result for SHA-256 517faa2b76706d23…

MALICIOUS

PDF

45.9 KB Created: 2020-08-26 22:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57daa420b189431312aea9788f1f11cb SHA-1: 568088cdef930abf0d8ae2d1b0105cd9bca6ecba SHA-256: 517faa2b76706d23aea9e06c660d08b5c7e3e71b15a24c528f226f5b409887e4
242 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one heuristic identifying it as a link farm and another flagging a specific link to a known malicious redirector. The document body, though partially corrupted, contains text related to a 'Praxis 5081 study guide' and a call-to-action phrase, suggesting a lure to entice users to click the malicious links. The primary malicious link identified is https://ttraff.ru/pify?keyword=praxis+5081+study+guide.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://ttraff.ru/pify?keyword=praxis+5081+study+guide.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=praxis+5081+study+guide In PDF document text
    • http://files.urbba.com/uploads/1/3/0/7/130775434/bawawoganitekol.pdfIn PDF document text
    • http://xubalorex.oughtakad.com/uploads/1/3/2/6/132681495/bufofexezabo.pdfIn PDF document text
    • http://files.thetlacademy.shop/uploads/1/3/1/3/131384789/dupive-madelubupazape-dezarekinoza.pdfIn PDF document text
    • http://vaxonar.jclarkgardner.com/uploads/1/3/1/6/131636648/buxomimaku.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/1/0434/0688/5031/files/93212626942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/vabipifuvatiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/2024/7194/files/54187015024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bipifapokuwegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/pekunoworojajovekisom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/fexapetuzokuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4346/3069/files/55714941275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4347/1008/files/jivisena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/29566666071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9977/4364/files/lidipirufomiruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1778/8830/files/free_estimate_template.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00005d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D40 5644 bytes
SHA-256: e5ab14227cdce61bda5b783542d81d2f41a5be2c1effec26d5cb911655bc53d4
font_01_sfnt_off0000708c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 10896 bytes
SHA-256: c62177c1336cc42f38d72c39a7f9e1f4e3345f26cdbe00c00bc4a73bbd06c236
font_02_sfnt_off000095eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95EB 16036 bytes
SHA-256: 52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550

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