Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d0810555a65f11a…

MALICIOUS

PDF

36.1 KB Created: 2020-09-18 02:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c91cbd1f9784a40a879381b68783fc1d SHA-1: d953f37a55e4669ca444375d00923847a1b2dc9c SHA-256: 5d0810555a65f11aff09691db52c9fe5bc349dedfa997fd6aa61891991edd911
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains, and one critical link to a known malicious redirector. The document body, though obfuscated, contains text related to a 'lennox elite furnace troubleshooting guide' and the malicious URL, suggesting a lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=lennox+elite+furnace+troubleshooting+guide In PDF document text
    • http://files.missionadventuretours.com/uploads/1/3/1/4/131453588/41578.pdfIn PDF document text
    • http://fagedo.exeterthreading.co.uk/uploads/1/3/1/4/131406390/4631232.pdfIn PDF document text
    • http://rulejid.thebearsnetwork.com/uploads/1/3/0/8/130874691/61772adc19f.pdfIn PDF document text
    • http://files.gzsartapalooza.com/uploads/1/3/0/7/130775347/183c20273385.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df657cbd-befa-46d6-8bd5-dbc9681a2f82.filesusr.com/ugd/61b8bf_09704a7ae72c4989b7024b15e51fd0e6.pdf?index=trueIn PDF document text
    • https://f064333f-9beb-415c-bf5a-371d7a73847b.filesusr.com/ugd/03a576_ddad73b0520540138aaa896aadf744a8.pdf?index=trueIn PDF document text
    • https://bc8e72b1-ff48-4938-badb-3b7e92d32871.filesusr.com/ugd/a91264_7318f767aec249c598b0901ec0b550f8.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7859/3185/files/aimbot_fortnite_ps4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7224/2342/files/bypass_frp_apk_huawei.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9770/1017/files/lepuduvibotupuwu.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 6

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_off00004d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D93 5432 bytes
SHA-256: 066affe85203fe09353eef2e7d55020483368bacab382327cab892bafd9da6d6
font_01_sfnt_off0000600a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600A 10468 bytes
SHA-256: 1f0b9b78f9fc6bcdec2995126d1fc777e06f983cc903d6af492f1b0107d81e91

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