Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9821cb17a3ef41f…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 14:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 139f3c4d428cde0bbf336188bead5286 SHA-1: 82bcd7b769664f21a79b7fd08c6ac7ecbd36b1bc SHA-256: d9821cb17a3ef41f75f72b87cdff6ba9b5b1c2a37e42478621a23a750b6150c2
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body text, though corrupted, contains the URL that leads to the malicious redirector. The ML classifier strongly supports the malicious verdict.

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=ccna+cisco+certified+network+associate+study+guide+pdf+7th In PDF document text
    • http://files.231fusion.com/uploads/1/3/1/0/131071067/7954523.pdfIn PDF document text
    • http://files.allisonknoxphotography.com/uploads/1/3/0/7/130775228/paxajumimex.pdfIn PDF document text
    • http://files.glassplaqueawards.com/uploads/1/3/0/7/130775982/zugikotabu-fekolip.pdfIn PDF document text
    • http://sewel.lighthousetravel.org/uploads/1/3/0/7/130775934/gijis-jizoranogidaz-jagepefaba-kawafarilo.pdfIn PDF document text
    • http://vojisu.ramiroplumb.com/uploads/1/3/1/4/131437736/5854901.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/1/0437/6671/0429/files/jurigevabasif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/linear_and_nonlinear_programming_solution_manual_luenberger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7577/8198/files/pear_to_pear.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/33297770123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5907/6502/files/56454812556.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/30527376714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1048/0537/files/35018349716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/18108862453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/xiwemozaxufoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9294/9658/files/xegosedutakapexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3978/4103/files/41058791544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/nadojoluwelasenivuko.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 7

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_off000054ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AE 5628 bytes
SHA-256: fe801bf7fe898f495f59ace403a682d5b637e7ddbb4f577309c68f16921dbf60
font_01_sfnt_off000067f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F9 14472 bytes
SHA-256: 70e99be3190156ae251b261d1a7ae7fc0c862b6d8cbb6225d18fb9dfe3c78c22

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