Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1ca0d9eb2a9e23…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 11:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d3ac0116b18e24be902e06f325284c16 SHA-1: 91432322114f91ef623218cf71294cef43bb74bc SHA-256: 9b1ca0d9eb2a9e2305086d195aeb67a08dc73cf9b494b2d34172ee0b445fb283
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 identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=gcse+maths+paper+3+answers+2019'. The document body, though heavily obfuscated, contains text related to 'gcse maths paper 3 answers 2019', suggesting a lure to entice users to click the malicious link. The presence of multiple Shopify URLs, some marked as benign and others unknown, indicates a link farm strategy. No scripts were extracted from this sample.

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=gcse+maths+paper+3+answers+2019 In PDF document text
    • http://files.shehrezadmaher.com/uploads/1/3/0/7/130776755/2104628.pdfIn PDF document text
    • http://files.lymanproductions.com/uploads/1/3/0/9/130969004/171232.pdfIn PDF document text
    • http://dupofora.britinn.at/uploads/1/3/0/9/130969352/8586033.pdfIn PDF document text
    • http://dibogeji.shirehistory.org/uploads/1/3/0/7/130776031/lenekenis_juvotiwip.pdfIn PDF document text
    • http://files.jyefinancial.com/uploads/1/3/1/0/131070872/4076256.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/1/0440/6837/2632/files/97869635426.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4497/5271/files/blank_map_of_central_america.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/pomigowuranota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3181/0463/files/building_information_modeling_for_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6042/8962/files/36588073890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/69211838509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/o_arcadismo_no_brasil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/vawinanolugurusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4200/4375/files/ansys_2019_r3.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_off0000556b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x556B 5908 bytes
SHA-256: b6ad620b179e44f6a9c1a18ac3c84d203a67d829575a2fd209b0eb78943211d0
font_01_sfnt_off00006974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6974 11096 bytes
SHA-256: 4f3c47aaa7e58838ed1bf43aabf5fdc9a8b84cea3303cd342b55a61ea8a468c3

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