Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dabcd940a3833e4…

MALICIOUS

PDF

119.7 KB Created: 2020-08-07 22:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b71c19b26ca2368ca4fdf1ea2160d3bd SHA-1: 5adee8bf750918c77d7a7250c59f3ca09dafeb52 SHA-256: 0dabcd940a3833e41b9fb659232aebefa7aae02e4212825938260f47dd5a9950
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to a 'vocabulary test' and the malicious URL, suggesting a phishing or scam lure. The presence of embedded URLs and the ML classifier's high confidence further support the malicious nature of this document.

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.com/pify?keyword=8th+grade+vocabulary+test+pdf In PDF document text
    • http://files.judith-castro.com/uploads/1/3/1/6/131606331/5703602.pdfIn PDF document text
    • http://files.chambleecharterhighschooljrotc.com/uploads/1/3/1/4/131438718/kofez-tavemepupa.pdfIn PDF document text
    • http://files.pathuberartwork.com/uploads/1/3/1/0/131070733/1992815.pdfIn PDF document text
    • http://files.draff.net/uploads/1/3/0/7/130740166/8461961.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/1/0428/9586/8067/files/github_cherry_pick.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81159011373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8037/5702/files/suvudexotolizuwejusala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8628/9832/files/proyectos_de_techos_verdes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/70273492740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/bopux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/protected_file_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/kci_wound_vac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/46614377503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2368/7067/files/18835019089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2686/6599/files/49170721297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/stone_sour_miracles_lyrics.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_off00019b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B6E 5816 bytes
SHA-256: abed2e252d59489c3f3859396978e6090821b75ca42f6cfc48e7805a5fd45c0c
font_01_sfnt_off0001af3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF3E 9920 bytes
SHA-256: 132cca7a2b659de587dae262db9c2eafd01e00948d9417e1a5c9ea0cead83928

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