Malicious PDF — malware analysis report

Static analysis result for SHA-256 0805166b2c6b233b…

MALICIOUS

PDF

42.7 KB Created: 2020-08-23 00:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02e8e664dd62b8f65e16befba42360a4 SHA-1: ace75043ba9bca89682ee2e19a97e6398cb54911 SHA-256: 0805166b2c6b233b01e86fe2a807317caf091109154875869531ee51ad8bbc5e
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a lure. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute 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.cc/pify?keyword=banded+iron+formation+diagram In PDF document text
    • http://files.stjohnsallegany.org/uploads/1/3/1/6/131637056/e65e4.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/1/0428/1594/6911/files/aflatoxina_b1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9948/8423/files/46757382600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/nusegigaravij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0667/3575/files/baby_photo_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/78044399730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/arrangement_of_electrons_in_atoms_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9547/4855/files/danalugudadome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/57434721785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/gulob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7048/7702/files/brushless_alternator_working_principle.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_off00006a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 5068 bytes
SHA-256: d19cf8af71e57f72fa7ac036eabceba76d8b39cd738104a7e671aa165fbf9959
font_01_sfnt_off00007b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B6D 10280 bytes
SHA-256: bd7942e91054afd2421d43f791012505dec7d02940b1bedc99db7ff68acd3a89

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