Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c804d82eb45ecc1…

MALICIOUS

PDF

46.3 KB Created: 2020-07-31 03:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c06129e19011020e42ea1026e2117e1 SHA-1: ae6b7144d0968a2ca66b70aaea094652ecb9eb7f SHA-256: 0c804d82eb45ecc127483a6bb926546abaf976a9aeff8768e9a32d145281174b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links designed to appear as educational worksheets, but they redirect to malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a high likelihood of malicious intent, likely to phish for credentials or deliver malware. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=adjective+or+adverb+worksheets+pdf In PDF document text
    • http://files.milaraphael.com/uploads/1/3/0/7/130776611/ripopujewodi_xifozarupi_relosimoximos.pdfIn PDF document text
    • http://files.educationsymposium2019.com/uploads/1/3/1/4/131406274/6817c6637f9e895.pdfIn PDF document text
    • http://files.racetherockstar.com/uploads/1/3/1/3/131380786/kixefuterudasezakuxa.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/1/0430/6350/9141/files/siberab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/10381719479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4994/2176/files/nibifokewubid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6872/7194/files/zegulipomarudaxivis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/lijedot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/5590791483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2737/2955/files/70391437967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/pekuwijeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6142/7867/files/rodusalarelukira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0240/4769/files/ziperan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/41355542541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/24855236584.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_off00007705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7705 5316 bytes
SHA-256: 751fb8480f4dd859caca3fe1b8a40ffbe4eed46e5df6ab9b1a0da411b6c6e5ef
font_01_sfnt_off0000893c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893C 10088 bytes
SHA-256: 10533cb8748b84f98456ebcf6f98f5f21bfa0b5a6722e29285b17098564043a6

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