Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e24e057f237209…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 18:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 412b0f95a03c568333028965a92f24d9 SHA-1: e239b27c6e44b061a69d3a30e95e0958aeb221b1 SHA-256: 80e24e057f23720949a623a4c30c2a21937109417c765498be3a0fa971434341
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary lure text "Competitive exam maths questions with answers" is designed to entice users to click the malicious link. The ML classifier strongly indicates maliciousness, and the PDF is flagged as a redirector link and a link farm, suggesting it's part of 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=competitive+exam+maths+questions+with+answers In PDF document text
    • http://fidigarom.thewildwaycoffee.com/uploads/1/3/1/8/131857252/e265dfeda12e.pdfIn PDF document text
    • http://files.urbanrenewaljazz.com/uploads/1/3/2/8/132816202/2228462.pdfIn PDF document text
    • http://files.jordanback.net/uploads/1/3/0/7/130739786/munov.pdfIn PDF document text
    • http://files.reidmachinery.co.uk/uploads/1/3/1/4/131438490/zikivemoji.pdfIn PDF document text
    • http://files.pdxfreeplay.org/uploads/1/3/2/3/132303013/kelin.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/1/0435/8874/7423/files/tafuwezibubegiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/81773341212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9769/9992/files/51702176092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0469/3400/files/bijaxugojipinelis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/juleporobedoman.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/western_australia_road_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/79918050754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8190/7870/files/participatory_assessment_in_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/jijiwiga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2122/files/wuvapot.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D44 5276 bytes
SHA-256: 8e87648b9c2d9addd9ab1ce452e14555bf81feee00018643fad1c2341a630a1a
font_01_sfnt_off00006f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F26 11368 bytes
SHA-256: 55049117e8a936037167e2ff61fba0c5e6608e1e605af713ffab5e5e59cd8c4e

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