Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d775d1f150ca6a…

MALICIOUS

PDF

42.4 KB Created: 2020-08-12 07:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f18dc3a6fdb37757c783ab80d006fd64 SHA-1: 8a8815dd60e6adab5b11a485333936bc2fdd3a7c SHA-256: 90d775d1f150ca6aa4b5267661568c48b455608a75ec1e565d1d02b7053ac599
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one specifically identified as a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious sites through these links, likely for credential harvesting or malware delivery. No scripts were extracted, limiting the analysis of direct payload execution.

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=geometric+progression+problems+with+solutions+pdf In PDF document text
    • http://files.adamhager.com/uploads/1/3/1/4/131406036/550c34.pdfIn PDF document text
    • http://files.womenofcountrymusic.com/uploads/1/3/1/4/131406149/4102680.pdfIn PDF document text
    • http://files.francofestcalgary.com/uploads/1/3/1/3/131380343/jobotasivexa-sopubizoj-vuniba-xixedakupesuloz.pdfIn PDF document text
    • http://files.physicsfox.com/uploads/1/3/0/8/130873908/mamazigen.pdfIn PDF document text
    • http://files.yummy-yoga.co.uk/uploads/1/3/1/1/131164479/1599385.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/1/0440/2269/4038/files/20756506977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3429/5966/files/zidaxasofawikumosiduzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6517/6217/files/archie_comics_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4571/5109/files/rapivoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/zotutiwufajixowaxexado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8497/0139/files/dakozosovubokesukewopuzir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1730/5240/files/staples_business_card_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/dragon_block_c_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/wcf_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/bank_of_america_holidays_2019.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_off00005da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA1 5624 bytes
SHA-256: 1e28ddbb559e47a148cbadc6ae8fa1c2a6488204bc925aebb3cb4221df862a06
font_01_sfnt_off000070a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70A6 13896 bytes
SHA-256: d9dd5b59778c6f11d3c96d505e0805f58487e42f31833072d08206fe156104e9

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