Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ac9fe214c11b77…

MALICIOUS

PDF

41.9 KB Created: 2020-08-18 15:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d0b3e24ad0f7a77d7c6776d7c5f05ce SHA-1: 5c00a308cff22915a11954a7db3d160151687a9a SHA-256: d8ac9fe214c11b779d7d8a15f1b7a8ded21e21e9c4460806e75ddc79e62bed0a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to a malicious site via a deceptive link.

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=dictionary+english+to+bengali+free++jar In PDF document text
    • http://tusag.ocracokesportfishing.com/uploads/1/3/1/3/131380213/guwakojow.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/1/0433/0687/7080/files/8128296882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/podikikonilogavaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/awg_to_mm_table.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/3461/9549/files/10_day_forecast_lincoln_ne.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/xogatilaruduparuwulibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/jalusoxusekageta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1554/4737/files/33814246911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/jquery_get_screen_width.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/85792432140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/train_platform_status_chennai_central.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC9 5460 bytes
SHA-256: a1e73c44b300576e4c7c9b3af3d6b0fcb69f8c1cdf1ab573d058c6b3636fdad5
font_01_sfnt_off00006e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E61 11428 bytes
SHA-256: 737758a66004e69bf485393625877cb92f9ee0228752e72b846448f95e05bf8a
font_02_sfnt_off00009365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9365 1740 bytes
SHA-256: 5f7498f8e433e4c6c47e8ca53e78f46c92ad2660f1d70c8a76bf58ffa4fc47b7

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