Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b82221f66b2424…

MALICIOUS

PDF

46.6 KB Created: 2020-08-06 13:43:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c6e11d41850ed1766068fcf23872fdf9 SHA-1: 06f9979b24595de18e753d22f75bdfcc72bf6a20 SHA-256: e3b82221f66b24243ba5447584feee2bafb6b6d42a305a1f40e8d00d74a23031
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'writing task 1 vocabulary pdf download' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious nature of this PDF.

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=writing+task+1+vocabulary+pdf+download In PDF document text
    • http://files.heroesbnb.com/uploads/1/3/1/3/131380842/sakulalidogi_jegabubak_telorolosa.pdfIn PDF document text
    • http://files.discover-davao.com/uploads/1/3/0/7/130740018/guparetedom_ziroduzajovig_gojiw_xukafiworazu.pdfIn PDF document text
    • http://files.paxsonscience.com/uploads/1/3/0/7/130740051/lixumuxubadud_jilubiga_gizasiwuvawev_sezexaxi.pdfIn PDF document text
    • http://tafovoler.coloradodachtoberfest.com/uploads/1/3/0/7/130739564/jitidetizusatozi.pdfIn PDF document text
    • http://files.christopherleonidas.com/uploads/1/3/1/8/131856937/63e17c5.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/1/0431/5670/1348/files/rusinixobelum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6370/4729/files/new_words_in_english_with_meaning_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/23908083690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/tobatamomaneveputavowaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5366/2876/files/93443468613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0899/1143/files/automates_programmables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/62704651634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5461/files/fijati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0361/6165/files/biology_textbook_10th_grade.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_off00007442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7442 5844 bytes
SHA-256: c7fce223b5de398c8d165990b6f390e3fffff3f0cc112e82781d399fb626fb58
font_01_sfnt_off00008860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8860 10908 bytes
SHA-256: 8098513061f330fb5d333fa928bcbbb10031c89ab4dcb16ba67194e4e6d1c99b

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