Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdf98acfe01ef187…

MALICIOUS

PDF

38.8 KB Created: 2020-08-10 15:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 37efa12839e1cc9e94ce9f824d37b63a SHA-1: c4e0a6e54b120833adac8b40bc41ee88c682e1eb SHA-256: cdf98acfe01ef187986e37433f58f8cb4fd44502459ef2753f092fc5b18f72ac
194 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to appear as search results for 'mpsc answer key pdf download'. The primary link, https://ttraff.cc/pify?keyword=mpsc+answer+key+pdf+download, is a known malicious redirector. The document body itself is heavily obfuscated but contains this same URL, indicating the intent is to lure the user into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=mpsc+answer+key+pdf+download In PDF document text
    • http://files.clevelanddance411.com/uploads/1/3/0/7/130740012/3297077.pdfIn PDF document text
    • http://files.forhisgloryministriescenter.com/uploads/1/3/0/7/130776460/nawap_gunuga_sirutobabag_zonizo.pdfIn PDF document text
    • http://files.thejadebeagle.com/uploads/1/3/1/4/131453028/36b96181282222a.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/1/0433/7411/7015/files/79069872768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7881/1810/files/netflix_wii_u.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4173/4301/files/45088338175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/lituzukobajiwebukab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/fadetifazaxejejanuwizuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9318/1087/files/83383033124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1374/1471/files/24969708251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3564/4319/files/how_to_change_taskbar_color.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/74533106078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0726/1341/files/vedifej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/83139637327.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_off00005931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5931 5412 bytes
SHA-256: 659ffceb75174a1acd5c2a53fae1d645da2f0787a5259360678c99ece4d6445a
font_01_sfnt_off00006bbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBE 10188 bytes
SHA-256: 81210acb645bd6e9d117bb7c6acd09f09ed72ee3e3842503412a47b802f65a20

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