Malicious PDF — malware analysis report

Static analysis result for SHA-256 84dc49f3ed235c00…

MALICIOUS

PDF

60.5 KB Created: 2020-08-08 20:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0bca287ab43c802cb546dc22d72829f6 SHA-1: 61658de01bbe3c6653e8b8d289897dc6ff982851 SHA-256: 84dc49f3ed235c0039feb5c2ff112b22ab157b7fc61666e0ad96ee069f9d95be
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains a reference to the same malicious URL, suggesting an attempt to disguise malicious content as a free download. The presence of many external PDF links indicates a link farm strategy, likely to improve SEO for malicious 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.ru/pify?keyword=autismo+pdf+articulos In PDF document text
    • http://files.allied-integral.com/uploads/1/3/1/4/131438036/9839870.pdfIn PDF document text
    • http://files.wellsfamilyministries.org/uploads/1/3/0/7/130775828/kadixawaroxa_debokudurez_sonogelevufo.pdfIn PDF document text
    • http://files.jdryart.com/uploads/1/3/0/8/130814226/xugin.pdfIn PDF document text
    • http://lizobep.bayportaerodromesociety.org/uploads/1/3/2/3/132303382/a51c378698.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/1/0434/7923/6774/files/honda_rancher_service_manual_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/excel_2020_function_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/19034487317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7929/4358/files/90898088772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4469/9288/files/medical_fitness_certificate_format_for_bank.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/moferufupewinuwoxesi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7994/9718/files/vinux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/vepesafax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/savetijatubizuperidevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2475/0504/files/rupapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/35949389465.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_off0000b033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB033 5288 bytes
SHA-256: 0b42b9270bff9c41db5009c2695437bc3a5da113d7189da0d1c2a531cedde338
font_01_sfnt_off0000c218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC218 10288 bytes
SHA-256: 8623f71afcbfa08203bc4fa9c49856b011ab5d3a94dbd97e9e71334c8194511d

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