Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c57998aeb30abd6…

MALICIOUS

PDF

35.3 KB Created: 2020-08-28 11:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 05a98b467f6308d5ffe805ca6da9908a SHA-1: 37288f6be3571213c7e4f0f622d1d602f1534199 SHA-256: 8c57998aeb30abd6f9938ae118a2b9d15d84ce0d888a7b2ca4f881e67cc65366
202 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many hosted on Shopify, designed to appear as legitimate documents. One prominent link, 'Flir cloud download', redirects through 'ttraff.ru', a known malicious redirector. This suggests a phishing or social engineering attack aiming to trick users into downloading potentially malicious files or visiting compromised sites. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=flir+cloud+download In PDF document text
    • http://puguwo.darcyclarke.us/uploads/1/3/2/6/132696056/gofidu.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/1/0428/1729/0406/files/characteristics_of_good_information_p2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fedixudarat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/29271257944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3756/4823/files/rupinder_gandhi_2_full_movie_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/64273462411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4659/0874/files/13334527566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/furniture_brochure_design.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/87492273347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/98516650152.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 4

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_off00004e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E78 4804 bytes
SHA-256: 65aad5e7b73c1cd845d6de1ffb94373b1ea8d98dcf16ad71c397ef4231c1f390
font_01_sfnt_off00005ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE4 10012 bytes
SHA-256: 80cec44c1e76b66eb72fb3aa6d9f4b3b70642c1a814eb700b4d60d95580a7e48

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