Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76b428cf5b7ad55…

MALICIOUS

PDF

41.4 KB Created: 2020-07-31 21:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76c99366a7423d48eeecdd2534598d67 SHA-1: 0889f5df55eaa5b3120c5421ac7a7962566d0603 SHA-256: c76b428cf5b7ad550df784d96a963342fe225c0b99b96bc7732988d9aa7931bd
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document's primary purpose is to redirect users to malicious sites, likely for phishing or malware delivery.

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=snow+on+tha+bluff+torrent In PDF document text
    • http://files.ildiamon.com/uploads/1/3/1/6/131606111/a90c50c.pdfIn PDF document text
    • http://files.driversedgrades.com/uploads/1/3/2/6/132696267/suxaki.pdfIn PDF document text
    • http://files.pamserrawenz.com/uploads/1/3/1/4/131437285/doroxi_joxixuluj_tutifubezej_jetozopididom.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/1/0431/1423/4016/files/zasevajirakumafevosik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/42567022235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/nanukosidisaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4389/8019/files/fuxanibibakakawakeruk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6455/6710/files/famob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3331/9831/files/kabusevedifodimedir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/blockchain_tutorial_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/15471250552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/73963721440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/jomositudab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5430/1338/files/44397827753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/xulanabigizujejasoreb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000657d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 5012 bytes
SHA-256: d60bb0b4e26c04e0a1abf70df6dad802a87f6519a3563cdafc0e8e81cb6c1d9a
font_01_sfnt_off0000769b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769B 10264 bytes
SHA-256: 3dab7e807628736a2592918f697443b9e107fdcb2b397dfebd9edb549691558c

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