Malicious PDF — malware analysis report

Static analysis result for SHA-256 7391fe7b99e81554…

MALICIOUS

PDF

42.8 KB Created: 2020-08-24 04:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 537793d415ca24a7fe52e91554bea94b SHA-1: 289644bf36ca107948bd080e8ab40254064eb0e0 SHA-256: 7391fe7b99e81554f262f5ae7760dd13f311297bb5b0e2c3f3b6030fb97e6d4e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains text suggesting it is a lure for a "Bulma login form example". The ML classifier strongly indicated maliciousness, and the presence of redirector links points towards a phishing or scam campaign.

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=bulma+login+form+example In PDF document text
    • http://kufipiwen.rosewadenyabooks.com/uploads/1/3/1/0/131071157/f8f66.pdfIn PDF document text
    • http://files.carlisleavenuediner.com/uploads/1/3/0/7/130776363/barevewoxogu_nusiwekimeken_rasitosenisa_kewofipise.pdfIn PDF document text
    • http://files.ryanvasqueznyc.com/uploads/1/3/0/7/130775658/nibem-rijofuke-voruvolapilut.pdfIn PDF document text
    • http://files.wendycharlton.net/uploads/1/3/0/8/130873783/xedenifogimuzefik.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/1/0436/4913/8846/files/50880727719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5394/0887/files/rurin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1488/0405/files/believe_in_yourself_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/xisedit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6225/5006/files/14806053188.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/digimon_rearise_underworld_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/sony_4k_android_tv_55_inch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2289/2711/files/xopewonugiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/kingdom_tv_show_episode_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9812/9062/files/52919208199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/27617327896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/algorithm_design_manual_by_steven_skiena.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_off00005b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B69 5160 bytes
SHA-256: 057537e4180754db66db4f27d72d7aff948a4fe439304a17a3a665ad98602f75
font_01_sfnt_off00006ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEB 15376 bytes
SHA-256: 9e6291dcbb0a555366024432331ae919c41dfee11f058561f644f0455fb4677d

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