Malicious PDF — malware analysis report

Static analysis result for SHA-256 989f53b3c2f588f3…

MALICIOUS

PDF

42.0 KB Created: 2020-08-05 03:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0d3273ad1dc7dda030bd239264fd4a4c SHA-1: 7e5cb4e4f1cc89706d25a71c2d1769bf7990105d SHA-256: 989f53b3c2f588f35a483b33d628b49a1bdd8ef3e69281fbf3501a6eac4e2c5f
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains the text 'Five steps to risk assessment hse pdf' and numerous URLs, including a suspicious one hosted on 'ttraff.ru' which is identified as a malicious redirector. The presence of a large number of external links suggests an attempt to lure users to potentially harmful sites.

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=five+steps+to+risk+assessment+hse+pdf In PDF document text
    • http://files.artcebu.com/uploads/1/3/0/8/130814859/rerowesen.pdfIn PDF document text
    • http://files.ashlandday.com/uploads/1/3/1/6/131636675/295edc6d1f6609.pdfIn PDF document text
    • http://files.rachellelabellesbooks.com/uploads/1/3/1/8/131857304/17094d495744.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/1/0429/0763/1779/files/niriku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4964/7264/files/63420464122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3831/7464/files/kokugafemizefabuzi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9565/4564/files/57437176235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4901/5701/files/29123765095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/41721934366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/youtube_video_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/14146494698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/argentometri_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/29891782257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2481/3977/files/john_deere_322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2210/4229/files/wudulirufoxoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9544/8999/files/468789199.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 5

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_off0000667e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x667E 5328 bytes
SHA-256: c02f37c3de41d5ca1b4f30d457090a562e98c708a834f14f609fb39ebc9e571d
font_01_sfnt_off00007880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7880 10216 bytes
SHA-256: f25e82494192bbd757d00a409e76b977b6d6e81f7e9a24fa7574f62afa01969a

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