Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0abdf6bcc2a19d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-10 17:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bca2ed10ecae3ceb9639e71bf2f04637 SHA-1: 2a4ecd6099c9bb5ac1998b749087fa4646cd2efa SHA-256: 1b0abdf6bcc2a19dad4bbfc53c3e302d9dee132058ab9555dfe6f9e506159b2a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a redirector to known malicious infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a significant number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a specific user-facing lure.

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.com/pify?keyword=erm+enterprise+risk+management+pdf In PDF document text
    • http://vejis.wisdombodyandsoul.com/uploads/1/3/2/7/132712615/57e62d937b4.pdfIn PDF document text
    • http://files.funkytownculture.com/uploads/1/3/2/6/132682802/jotexugowovi-pibukurinuviso-guxatewirisa-torapo.pdfIn PDF document text
    • http://voviru.alliedcontractorsgroup.com/uploads/1/3/2/6/132681352/daremugafopafaj_rupogerab_kilalowe_kunitimipada.pdfIn PDF document text
    • http://mivow.spanishkc.com/uploads/1/3/1/4/131453574/rupeduv_powigi.pdfIn PDF document text
    • http://sinaro.kauaideeptissue.net/uploads/1/3/1/4/131406082/gulogokexi.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/1/0430/4293/0842/files/61355632801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/analysis_services_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/fixakeretijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/how_to_compress_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/51472496299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/rolujakogokemovososemudus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/30627016044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8339/8310/files/wimonubowifevita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/felamisakawubibaxejurelok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/computer_networking_basics_book.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 3

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_off000060a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 5348 bytes
SHA-256: 2b9b07022bdc65846742e2d5d43c574803386694016e9033c5d14bd865b9e441
font_01_sfnt_off000072b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B5 11288 bytes
SHA-256: a241c1ff28f62645dcc4db955669cca017902231d049831317cfd3b63f50d5b5

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