Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d03c9a4ef8b4b89…

MALICIOUS

PDF

45.9 KB Created: 2020-08-06 08:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e8b1fbb8633bd6a23c76935ae2e9852f SHA-1: 56cce73bc6b4beb231a54738066735fbf4e29c05 SHA-256: 8d03c9a4ef8b4b893fc5a8c2d31c6b05cf523b0e3f51132d1a36b75e78d19abf
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented within the document body, disguised as a search result for 'Ielts general reading practice test 2020 pdf with answers'. The PDF also contains a link farm heuristic, indicating a large number of external links, many of which point to Shopify domains. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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=ielts+general+reading+practice+test+2020+pdf+with+answers In PDF document text
    • http://files.merakibeeswaxwraps.com/uploads/1/3/1/4/131453193/d364a.pdfIn PDF document text
    • http://tozodupa.selisterauthor.com/uploads/1/3/1/1/131163635/ganat_nuzofibafaveker.pdfIn PDF document text
    • http://files.fullerthanlife.com/uploads/1/3/1/3/131384660/jodabusuwepowumubike.pdfIn PDF document text
    • http://files.k9rehabvet.com/uploads/1/3/0/7/130775084/4d3535fdf756646.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75320426607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7868/8674/files/lopogulolerisokojesorip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/90778619328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4131/7276/files/dixofawasamarugakuviwobef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buwukepenarunowara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/18642678240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/ignition_timing_procedure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7751/5929/files/xalokok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8140/9436/files/semakizunuwum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8191/5804/files/closing_an_email.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000672b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672B 5400 bytes
SHA-256: ad173a835f58c270b21bb7da6237972b385fc6d38d003e885f7cd75f45d900d1
font_01_sfnt_off0000798a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798A 10144 bytes
SHA-256: 43feeeb8d1a9747f15ffe402b093c1a3c452f92b465e2ac3ef634f6418a76dab
font_02_sfnt_off00009c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C45 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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