Malicious PDF — malware analysis report

Static analysis result for SHA-256 85817bf7ab5ed545…

MALICIOUS

PDF

52.4 KB Created: 2020-08-17 15:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bdfdd7b106dbb33bc5520c5f83a41fd0 SHA-1: 718c1811d02e795c55eb0a25ccc31b6e2d0272be SHA-256: 85817bf7ab5ed545f0672a94a6ebb015d1690a82b29fa93b2ac39e567d86f365
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, with a critical finding that it links to known malicious infrastructure. The embedded document body text, though heavily obfuscated, contains a URL that matches the primary malicious redirector. This suggests the document is designed to trick users into clicking a link that leads to a malicious site, likely for phishing or malware delivery.

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=beema+audio+song In PDF document text
    • http://files.dustyhikes.com/uploads/1/3/0/8/130874101/78747c273.pdfIn PDF document text
    • http://files.mare20.com/uploads/1/3/0/7/130738852/594678.pdfIn PDF document text
    • http://files.jodileeart.com/uploads/1/3/0/9/130969938/sokovobavitika_nopaxewavaromix_menebeketo_maxujaputes.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/1/0427/4293/9814/files/fimusaxegumedobodefuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/minirefotapobizezuloxot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9902/1731/files/relief_carving_wood_spirits.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/heart_pieces_twilight_princess.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4567/files/96818551654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/les_infortunes_de_la_belle_au_bois_dormant_ekladata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/xiriduwizejajozuveritiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1045/6730/files/minecraft_fairy_tail_servers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/pevinofixoxebokekisuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/kekoza.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A45 5064 bytes
SHA-256: b49c0cf8c6dbe063ce9df81cbeedc81e9b92a71d31e66bc28dbc9cd1445f5c71
font_01_sfnt_off00008b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6B 10476 bytes
SHA-256: 4a40d34d6432639f5dbf1a0557cd134c6fa48a110cc460b99a6bc7bb07d0ae0c
font_02_sfnt_off0000af8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8E 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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