Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cdd50fc2499b6f…

MALICIOUS

PDF

55.1 KB Created: 2020-08-19 17:25:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 92a20b47c2d95d98ff27f720863003fe SHA-1: f728c69fd5143a44809db032b476363c3130d889 SHA-256: 29cdd50fc2499b6f3c12828ae436cb6271d0d25e70ad43c916f948b24a22457d
194 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=ba+computer+science+syllabus+pdf', is designed to lure users by impersonating a syllabus. While no scripts were extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to malicious sites.

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=ba+computer+science+syllabus+pdf In PDF document text
    • http://files.supportingpresence.com.au/uploads/1/3/1/8/131856257/nuzowo.pdfIn PDF document text
    • http://repexawub.moveaheadwithkelly.com/uploads/1/3/0/7/130775929/lezobawalopuwimi.pdfIn PDF document text
    • http://files.witnesslegend.com/uploads/1/3/0/8/130873979/5907491.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/1/0449/0225/2711/files/avalon_hill_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6402/4479/files/43439989907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/prentice_hall_algebra_2_workbook_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/55487417473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/wrap_wellness_recovery_action_plan_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/visubiberarob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4797/7114/files/gutedaniditirubodosapob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9299/1399/files/10040534882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/wowebusivugifowapipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/gonix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9183/5547/files/mofarugiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/duboro.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 4

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_off0000976d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976D 5592 bytes
SHA-256: 76569907446df8c2f216672d18e4e1a5ea902c2e6f026e18733c1bdf315bfcca
font_01_sfnt_off0000aa52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA52 11108 bytes
SHA-256: eb5c494fdd1f25ce8563bfa160c455726f35a798753e2a69642340a55ccf26f3

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