Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d817adf03c2feb…

MALICIOUS

PDF

44.7 KB Created: 2020-08-19 13:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9f748160f86ba580890ef4afa4871d5 SHA-1: 037b9adfc468e82c69adc562f2a9174284189661 SHA-256: 55d817adf03c2febedcc940c4d1f8c98b8f52b671d2ef56000fd5c6a80a91698
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure ('Draft answer key meaning') and the malicious URL. The presence of a mass external PDF link farm further indicates a malicious intent to distribute harmful content.

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.ru/pify?keyword=draft+answer+key+meaning In PDF document text
    • http://files.beautybehindbars.org/uploads/1/3/2/6/132695194/tejonetadatosa_luwek_safukiselow.pdfIn PDF document text
    • http://files.misswcourtroom.com/uploads/1/3/1/0/131071252/1590104.pdfIn PDF document text
    • http://sugawada.jblaw.ca/uploads/1/3/1/6/131606490/0421faa0f85c06.pdfIn PDF document text
    • http://files.bellamedaesthetics.com/uploads/1/3/2/7/132712514/f98663.pdfIn PDF document text
    • http://files.beetlenation.net/uploads/1/3/1/4/131437699/6704816.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/1/0430/2936/4885/files/amado_mio_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/77804599724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3012/6490/files/31095479988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4704/9623/files/carbon_footprint_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3138/6517/files/practical_management_science_4th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4962/2431/files/zilebuwejosugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9743/7848/files/adobe_reader_download_gezginler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/88041241322.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 6

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_off00006491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6491 5312 bytes
SHA-256: d8dab5491a5f85e863df966e6e18b143c57e68cebbc8556eca13ba0867a076e8
font_01_sfnt_off000076aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AA 15368 bytes
SHA-256: b3c1ac2c1ef761467af2139aad6adebae591faf7b29b81bc0cebe8a6959afd47

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