Malicious PDF — malware analysis report

Static analysis result for SHA-256 106be39e26c2e9ba…

MALICIOUS

PDF

43.8 KB Created: 2020-09-07 02:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f39780cd09ef09d7de07ec67c77470f4 SHA-1: 964035c404dcde338adfe01e9b3a541c94124283 SHA-256: 106be39e26c2e9ba046f7c7c3d71896af846053c6f0745580e1ab8a9d472537b
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically a URL designed to lure users with the promise of free templates. The ML classifier strongly indicates maliciousness, and the PDF structure includes numerous links to external resources, many of which are SEO-optimized redirectors. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.me/pify?keyword=free+gantt+chart+excel+templates In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/d1c05f_ea3467bc37834321abfce84f4f724916.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/96564c_be1e4bd0afc54e9c827fd4eeeeccaacb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bf0735_ecf0bd2753bd430193cc6a9b4c4b189c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6d45f6_896426511fa247a1b11969aba6d1d269.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/866690_7d7af36af6aa4a2c945f9f6d080f7920.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d5d855_cadabce44067415fb74b93e4b3824ba4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3826db_2bdec099aadd428a8b69f50b0ec33584.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/01bc73_d7b46482258f4d17bb11e37b3fc740c0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b5973a_18b338eae9d846d08c8d908fa9cbc2e2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4396/3548/files/lusozovolosaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/56705162399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/the_substitute_denise_grover_swank_read_online.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 7

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_off0000611c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611C 5372 bytes
SHA-256: c0041697d74818a4772ca889253e7af3630a518c9fb4c8ce52891f0c6a0d7f11
font_01_sfnt_off00007339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 2188 bytes
SHA-256: ee448ea0b942f8e3cc7ddfe0d5dc4c7c6f0a1a62bc92910c35c663b4662f014c
font_02_sfnt_off00007d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3E 10288 bytes
SHA-256: 4486196991a5b9e4e57434147666486b230023924c97c3e39ed44fb0a8fc22eb

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