Malicious PDF — malware analysis report

Static analysis result for SHA-256 55709327ebf62e7a…

MALICIOUS

PDF

57.8 KB Created: 2020-08-04 21:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 38308792f9b0de005a086528b583979c SHA-1: a8e764f52ee1d5e510c8bda535086e88d33887aa SHA-256: 55709327ebf62e7a15930f0464386aba9a91e6f9baba73788f19a68c591981be
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector link to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to a book title and a URL that is also present in the heuristics. This suggests the document is designed to trick users into clicking malicious links, likely for phishing or malware distribution.

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=brain+on+fire+my+month+of+madness+book+pdf In PDF document text
    • http://repodi.gbmphealthcare.org/uploads/1/3/1/0/131070487/7662492.pdfIn PDF document text
    • http://files.dawnmoniquewilliams.com/uploads/1/3/0/8/130874566/daviborafidagoxunus.pdfIn PDF document text
    • http://files.funnyfacespz.co.uk/uploads/1/3/1/4/131483361/jusotopirak.pdfIn PDF document text
    • http://files.fjreitztheatre.com/uploads/1/3/0/7/130776498/f5e2f3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/bojegujulotiduzonamatozon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2743/9526/files/lomiduzabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8646/2620/files/91237981675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/87671169271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0817/8845/files/kexivagetirimeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/97757529074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9988/9569/files/cardioversion_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2568/6951/files/77175418364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7378/1411/files/vejaselaburadolosused.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/74324229892.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 5

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_off000096ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96EF 5392 bytes
SHA-256: ac964ac2d4bdad31b09f4c6e299baff88814c8c44973188a4573ff3402ef6876
font_01_sfnt_off0000a916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA916 10136 bytes
SHA-256: aee81106c7eabf3e394477058237fd0c00af4317a2f6117d7cf01811993ab332
font_02_sfnt_off0000cbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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