Malicious PDF — malware analysis report

Static analysis result for SHA-256 c643a41919fe0d88…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 23:48:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d4f1f018d71d21e51afe7aefff69f4c3 SHA-1: fb9bc440d0befe67a78e1f606eaa167d4f7f35fe SHA-256: c643a41919fe0d88bf16a3a307bacee6c927b4b9ef4b9af37d7a4dc98d2c098c
234 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=super+vpn+proxy+master+app'. The document body, though heavily obfuscated, contains this URL and text suggesting a 'Super vpn proxy master app' lure. This indicates a social engineering attempt to trick the user into clicking the malicious link, likely for credential theft or malware delivery. The presence of a PDF link farm further supports a malicious intent to distribute links.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=super+vpn+proxy+master+app In PDF document text
    • http://jixosak.kansascitywriters.com/uploads/1/3/0/7/130738706/8241048.pdfIn PDF document text
    • http://files.japhotos.me/uploads/1/3/0/9/130969346/91b06dffa.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/1/0429/8961/7311/files/pixepuduwobuzimavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/nipawugudokami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/20158924631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/jelijoxoketis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/lifimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/action_research_in_education_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5755/9190/files/puxelapugepinafitabizax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3046/1081/files/devosexaketup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8388/8808/files/18762236065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/gemebugizasofikofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/65154643044.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_off00006fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBD 5268 bytes
SHA-256: 833c38e0aced3b84a2ee14a216b0da3ed4201a4fd30eb9c601d64c7270d56fa9
font_01_sfnt_off0000819b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x819B 10100 bytes
SHA-256: 15ed46c8bdcf553a0ef9fc01e9b3078c7fbdc918fb59fadd54f7898b67d1d4ca

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