Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc5f10b5fe08564…

MALICIOUS

PDF

58.0 KB Created: 2020-08-08 01:07:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7c631d214caeef4ad93146a1edf6ac45 SHA-1: 3478f3a7e79c2eb1e78f88814b109d93902fe8a3 SHA-256: 0bc5f10b5fe085645faf6fffb2cfa0bf20555209f4abbf7c5e8b86871ea2cb47
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body and embedded link structures suggest a phishing attempt disguised as a free download, leveraging a redirector to obscure the final malicious destination. The presence of numerous external PDF links further supports this SEO-based lure tactic.

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=ordinal+scale+of+measurement+pdf In PDF document text
    • http://files.allcharacterswanted.com/uploads/1/3/1/4/131407469/pezituledinaf.pdfIn PDF document text
    • http://files.chargerstage.com/uploads/1/3/1/8/131872055/sitoj.pdfIn PDF document text
    • http://files.praisetabhawaii.com/uploads/1/3/2/7/132712011/sugeb.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/1/0431/5771/7143/files/61004464382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/pakinejazikizamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/wodojubavudexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/45607786995.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/www._act._org_compass_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0989/1742/files/77892107898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/tujapadifavuwofaturiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/13893904468.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9750/9278/files/atharvashirsha_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/628039883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jibivugutujul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2996/8534/files/49262793943.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_off0000a535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA535 5328 bytes
SHA-256: 7ac4b8db31ec9647de5d359cf0a4c7465fadfd9c1ddfff1afd292f10c46d22f6
font_01_sfnt_off0000b737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB737 10424 bytes
SHA-256: 6b78ef53cad3aa7f241d2ed5dceccd9d408ec765afdc6e624c57521832a5cfaf

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