Malicious PDF — malware analysis report

Static analysis result for SHA-256 320bb52092feb29a…

MALICIOUS

PDF

39.8 KB Created: 2020-08-18 14:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf6a36747742e17d82394c5b2ad1086c SHA-1: a7ca21df6e75ae03915ffddaf9dc24d0235789af SHA-256: 320bb52092feb29ad9ce4cbe4a20499cc68c1536b47c499091da4faf5cc3c43e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary link directing to a known malicious redirector. The document body, though partially corrupted, includes text related to Microsoft Office and Excel, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious activity. The presence of a link farm further supports the malicious classification.

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=microsoft+office+creating+labels+from+excel+spreadsheet In PDF document text
    • http://bekowa.biologicalwasteexpert.com/uploads/1/3/2/6/132683014/0e51a6668.pdfIn PDF document text
    • http://bijizovo.subjectmattertap.com/uploads/1/3/2/6/132681670/lirexapowi.pdfIn PDF document text
    • http://files.zeriongroup.com/uploads/1/3/1/8/131857305/5979019.pdfIn PDF document text
    • http://zurut.htdesigntech.com/uploads/1/3/1/3/131380213/tenanujewu.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/1/0439/8641/9870/files/lujimaroxovosexewulagifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/netuxonifofozawuvazunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1572/4443/files/5541898377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/manufacturing_and_automation_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7179/0494/files/laminijavibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/20416569062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zinigezumapafukutogu.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 2

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_off00005df6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF6 5780 bytes
SHA-256: edb8da44e67d2ef8696712484bf8b43ace4031735bc7e77ce1b0dc9b1a08de9c
font_01_sfnt_off00007172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 9616 bytes
SHA-256: 9eb81f295942c921a0ac25cb64cd4eb3942ead31c03f352cf05d4b2b1757abfe

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