Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e78c0fc6a239c47…

MALICIOUS

PDF

45.8 KB Created: 2020-08-15 03:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5c867e59541a7a2afd708c4c9a61d468 SHA-1: fb2d664a514902594a2a9018293952fe580d4d19 SHA-256: 3e78c0fc6a239c4726da53fa9c975330f70ae37fb6c6e6230263ddde49f670de
194 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. The document body text and a critical heuristic indicate that the primary lure is an 'IELTS reading answer key' which, when clicked, leads to the malicious URL https://ttraff.com/pify?keyword=lesson+for+ielts+reading+answer+key. This URL is likely part of a phishing or malware distribution chain.

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.com/pify?keyword=lesson+for+ielts+reading+answer+key In PDF document text
    • http://pagusede.dermatagespa.com/uploads/1/3/1/0/131070598/5486126.pdfIn PDF document text
    • http://files.arielzylberman.com/uploads/1/3/1/0/131070051/jepatopo-dalasuripol.pdfIn PDF document text
    • http://files.acuityhearingsolutions.com/uploads/1/3/0/9/130969183/nonaputuxi.pdfIn PDF document text
    • http://xujane.markkowaleski.com/uploads/1/3/2/3/132303382/ec54a3.pdfIn PDF document text
    • http://zusijibox.dawnamberknight.ca/uploads/1/3/1/4/131437792/pojamajem_bufiv_suginabexixod_sipovipikosoxu.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/1/0435/5801/1035/files/risc_in_computer_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8951/6962/files/26511862230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8308/8547/files/tikonaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3467/3305/files/agamemnon_full_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/xikijebusepakuxuruvota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1674/7170/files/prentice_hall_reference_guide_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/78302154513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/jotadib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/darurekuxadapazovikenefo.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_off0000608c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608C 5276 bytes
SHA-256: f68803c2908d68103a97a8b3c1821706cc573468d0f20b04c32c0f811286d68b
font_01_sfnt_off0000729f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 10148 bytes
SHA-256: 11407a0e7c1e2de924b74e50d6b5f3bd6d7e32f0053a6e226185306cf27beced
font_02_sfnt_off00009550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9550 16068 bytes
SHA-256: 9e1271d681207e96fe60c94df920a27091a957dc81e2614e9e6235263a34fce6

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