Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59a1b8e9aa11d79…

MALICIOUS

PDF

39.9 KB Created: 2020-08-06 05:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1976bded58be1f0f420398dfa3fccc63 SHA-1: fe18472fdd76dafd84e718f8a30eb015c28f7f7f SHA-256: f59a1b8e9aa11d79cf1c42531a436c49eaf774b2d5180c3946951a04db1a3291
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=conduction+heat+transfer+poulikakos+pdf'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=conduction+heat+transfer+poulikakos+pdf In PDF document text
    • http://files.drafthullcleaning.com/uploads/1/3/1/3/131380288/8d320cc.pdfIn PDF document text
    • http://files.gblawns.com/uploads/1/3/0/7/130775368/4614030.pdfIn PDF document text
    • http://jonetafom.mostarmun.com/uploads/1/3/0/9/130969744/pebolibog.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/1/0434/5780/6488/files/47421880377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4098/7543/files/95800971430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/vuwavavakasofeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4928/6817/files/resmed_cpap_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/vuferegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/78572882980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/an_inspector_calls_full_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/7335469759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1097/4108/files/nabiwuvakutagadusijeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/91632754855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/88978828558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0523/8688/files/astrotheology_for_life.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 1

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_off00005b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9E 5212 bytes
SHA-256: b53f8b36ca14c131b461cff9a0b8108e85711abb2ccb0f0cbedd864cd7e12f48
font_01_sfnt_off00006d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4D 10408 bytes
SHA-256: 823138b13606c91c86aed71dcd5e6a69ee8f0a26bbbb0255fa1b2c2b8e4d9c06

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