Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42df68aaef25209…

MALICIOUS

PDF

47.2 KB Created: 2020-08-20 04:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc552c5e584b1eeda7dc251f9ece96b2 SHA-1: 7831c20c1e0cee8dc35478bc7fe691ea5f4a7352 SHA-256: f42df68aaef25209c97e725c142812931740ef07cfd85e5c477c6626a491ee86
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to manipulate search engine rankings or redirect users to 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.ru/pify?keyword=karndean+flooring+fitting+guide In PDF document text
    • http://winat.kellysserenityhouseinc.com/uploads/1/3/2/6/132680981/df7829f43.pdfIn PDF document text
    • http://files.midtntrailcam.com/uploads/1/3/2/6/132681863/9517377.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/1/0434/7019/2805/files/tamanojonezininegako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/23376854411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/72790568051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/zizumejoxekisarufanimevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/67883618790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/44687633587.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/nalokirosabori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/74837597679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/wikowaxaxukajowajiposisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2428/0726/files/einfache_quadratische_gleichungen_aufgaben.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F00 4748 bytes
SHA-256: 015b3d762b56672de894014c6afe81d430062a42b4b6b440c509892b151aeca1
font_01_sfnt_off00006f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2A 2000 bytes
SHA-256: a2a90624cbe5587f45d0eca6751e78d377564e1352e0ea7d43f3c131a35e6395
font_02_sfnt_off00007874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7874 12944 bytes
SHA-256: c9f591e54f94d3e3a11d7b0cc83ec3f44895d745be80d0ea389bfda429e18a2c
font_03_sfnt_off0000a16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA16D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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