Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd8140bb5de61b8…

MALICIOUS

PDF

39.4 KB Created: 2020-08-21 07:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14330151aab40d16813eeceb7e92d1f4 SHA-1: e331924dac5030917b75effe04d4c0850827e77d SHA-256: fbd8140bb5de61b87e9054c7add0369dfae5671a5ab4280f8087255d029d6ecf
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=tropical+storm+karen+forms'. Another critical heuristic identified a PDF link farm, suggesting the document is designed to distribute traffic to many other PDF files. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the primary attack pattern is clear from the embedded links.

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=tropical+storm+karen+forms In PDF document text
    • http://files.hannabruer.com/uploads/1/3/1/4/131437976/figuworudi.pdfIn PDF document text
    • http://files.gangneungtours.com/uploads/1/3/0/9/130968950/7226213.pdfIn PDF document text
    • http://redom.ipksportsbetting.com/uploads/1/3/1/8/131857252/xulubafude_fowiwu_sowelorujigeb_kamagigo.pdfIn PDF document text
    • http://givamuke.finalbitemosquito.com/uploads/1/3/1/4/131408172/latobugamo-kubazudiwale.pdfIn PDF document text
    • http://files.uniqueandbeautifulshop.com/uploads/1/3/1/3/131382274/baxosamux.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/1/0436/1791/0947/files/calendario_liga_nos_19_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/tiweke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2691/3179/files/benzimidazole_synthesis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/ponujomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/boxisefodabexiwiwaxiwis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/77462674762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0522/2813/files/31056369876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/abyssal_sire_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/9553899261.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_off000059bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59BB 5172 bytes
SHA-256: a43ee2a943999c26ce329b0bb7d1fdee72c336accd372b4d1b53689fc646a397
font_01_sfnt_off00006b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B39 10944 bytes
SHA-256: 64e089f55c6a31a57682f415a9fbb547880b201660b3d86a654129e636991071

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