Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb3dd56b19aa136…

MALICIOUS

PDF

39.1 KB Created: 2020-08-19 09:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3c4b535afb4c6ad62e11170cceb2b50 SHA-1: fe577e18ae7d737337c2f0ba2f4fa96926060f2f SHA-256: fdb3dd56b19aa136e124809a7ab066e40fc3cb5224df688b788decb19be03c18
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=cooling+curve+questions+answers'. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect the user to malicious content. 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.cc/pify?keyword=cooling+curve+questions+answers In PDF document text
    • http://files.mountainmovingjourney.com/uploads/1/3/2/6/132682561/621c7139572930.pdfIn PDF document text
    • http://files.thesconnection.com/uploads/1/3/2/8/132814900/tejedosesew-nibijolol.pdfIn PDF document text
    • http://files.colorblast5k.org/uploads/1/3/1/4/131412235/luloxefotevijunoz.pdfIn PDF document text
    • http://files.actioncomputerservice.com/uploads/1/3/1/3/131378990/xukizo_mivonip_sedana.pdfIn PDF document text
    • http://tidijaf.larienca.net/uploads/1/3/1/4/131453536/2dc13cd5358c58.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/1/0437/4652/5338/files/marekita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/quiste_de_segundo_arco_branquial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/31106280728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/15963966321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/4780083199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0584/5397/files/genemopoxevogikuxufutofos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/basanokajamaponilatugoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8908/2006/files/rubodunewuxet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5502/2234/files/guvowoxuwomafazuloki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/menubiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/babylonian_civilization_inventions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/71942145571.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 8

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_off00005b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3A 5152 bytes
SHA-256: 3ca94bed793620676b21cdded8923947614eb2a350bd07f88c0620cc50383d8d
font_01_sfnt_off00006ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE4 10088 bytes
SHA-256: 37f4a732f9671171e1df7ad9a6f9ed2e3b6e6f0cc2c37aff051265d9c98602e2

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