Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d87b6be0c07861…

MALICIOUS

PDF

58.8 KB Created: 2020-08-20 22:52:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0455325f127cbeeac744e83b8100e1d5 SHA-1: 598ecf3fc92e1eee542677c2866ee43426047ee6 SHA-256: a9d87b6be0c078619d359684695cee675f4a06aa4b8a77ced71bc6cac2bab57d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'project report' and includes the malicious URL, suggesting a lure. The presence of a link farm further indicates malicious intent to distribute harmful content.

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=electro+hydraulic+braking+system+project+report+pdf In PDF document text
    • http://files.kristyboisvert.com/uploads/1/3/0/7/130740196/955411.pdfIn PDF document text
    • http://files.northernbeacheseisteddfod.com/uploads/1/3/2/6/132696483/9a8f46ebb3fa6.pdfIn PDF document text
    • http://files.energygroupuniversity.com/uploads/1/3/1/4/131407057/234402.pdfIn PDF document text
    • http://vafamumu.daniellabloom.com/uploads/1/3/1/6/131606490/pubibexesisaxusuka.pdfIn PDF document text
    • http://lobuveka.thebigbarmitzvah.com/uploads/1/3/1/4/131453541/3473869.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/1/0432/2616/9503/files/92263076292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/seconds_to_mins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/76878728696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/kendo_scheduler_editor_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/sisikajiwomelulepup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0156/0737/files/31708014906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/54466525515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/probability_mass_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1769/7437/files/45522940014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/mavekup.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_off0000a71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA71A 5908 bytes
SHA-256: 31e35a4770f8c40e6611d53dcee9e23f605f3f88b766f6d442c827d7862720f4
font_01_sfnt_off0000bb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB11 10072 bytes
SHA-256: 0beaee060a617f7a37e706988217e82d69b87dc432aa9e44174366711b2b7560

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