Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a2679f1b83ef6f…

MALICIOUS

PDF

48.9 KB Created: 2020-08-22 13:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 772e5f6e1bc576cf670520eebd27363c SHA-1: b2e8168a79314fa03261b903b16429ce395c755d SHA-256: 51a2679f1b83ef6f5adca868a2c3f282ff36c986b10ce391b2f1d38af8f39052
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=scientific+calculator+app+android'. Additionally, it exhibits a PDF link farm heuristic, with many links pointing to Shopify domains, one of which is 'https://cdn.shopify.com/s/files/1/0439/3671/0824/files/fanaro.pdf'. The document body, though heavily obfuscated, contains references to a scientific calculator app and the redirector URL, suggesting a lure for malicious redirection.

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=scientific+calculator+app+android In PDF document text
    • http://files.aokcollectibles.com/uploads/1/3/1/4/131437276/dubina.pdfIn PDF document text
    • http://files.avriltahoe.com/uploads/1/3/0/8/130813588/3915314.pdfIn PDF document text
    • http://files.taurangacivicchoir.org.nz/uploads/1/3/1/3/131380292/eb77b75a.pdfIn PDF document text
    • http://files.chrissyandlee.com/uploads/1/3/0/8/130814515/2470298.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3671/0824/files/fanaro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/19278534332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3016/8230/files/corresponding_and_alternate_angles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/somewhere_over_the_rainbow_uke_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/64181247289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5350/5946/files/kizer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/minor_arcana_tarot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/fajowababigodufi.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_off0000756a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756A 4956 bytes
SHA-256: a307481739ddce07470caac03769453d9b76717a7133bf35b25c8b7784c3e42a
font_01_sfnt_off00008641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8641 10028 bytes
SHA-256: 27321b242d2e15d0938881a6e4f6c3df29d0b75fa2c8d7985fff3cc0f511a017
font_02_sfnt_off0000a894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA894 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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