Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4a00bbe87c05f0…

MALICIOUS

PDF

43.0 KB Created: 2020-08-19 08:02:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c5fcc597d16f23a7872a9f66664bb11e SHA-1: 1efaa08e2aab9730050ff06255bfd9159a595100 SHA-256: 7b4a00bbe87c05f015e919aaa10979443770e95bef3cdc472fe462cc1589f92d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.cc) and then to various Shopify-hosted PDFs. This pattern is indicative of SEO link farming used to distribute malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious 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.cc/pify?keyword=c+programming+questions+and+answers+pdf In PDF document text
    • http://xoxel.gaiagraphics.co.uk/uploads/1/3/0/7/130739860/roxuga_wofilememet_gerirel_vulejezudusu.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/1/0434/1451/9966/files/35552577675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/98910468600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6221/3270/files/bible_quiz_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/vajanomegevowasarotegedu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/beautiful_things_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/jozuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/duderaxig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/tukukiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9435/1778/files/25574290612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/nuwufebali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1570/7551/files/23666629070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8946/8328/files/xalajukame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/73423664162.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 1

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_off00006ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD1 5452 bytes
SHA-256: 4014a11b2fe88737a56720e43e9989de952bba210a35d64b6825fba5d8beddcd
font_01_sfnt_off00007d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4C 9872 bytes
SHA-256: 09a43b72642a669ce50f4ab0d1827b4d8ec3cb4d384a37d9e4a3633e4fe850cb

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