Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5938fae29e500a2…

MALICIOUS

PDF

34.7 KB Created: 2020-08-15 04:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a154142cc86e57a5380067bd742d7f88 SHA-1: 1a66a50d4abaddb655637997194bad6a13b94c89 SHA-256: a5938fae29e500a2bbaef17c71913da0d940a34ae497c1dfe66e5290788c16dd
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.com/wb?keyword=once%20upon%20a%20december%20choir%20pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to benign content on cdn.shopify.com, likely as a camouflage technique. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be luring the user to the malicious redirector.

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/wb?keyword=once%20upon%20a%20december%20choir%20pdf In PDF document text
    • http://files.fgiii.net/uploads/1/3/2/7/132712233/1222144.pdfIn PDF document text
    • http://babonewep.ophthalmic-devices.com/uploads/1/3/0/9/130969360/punubixumukunew-togojinijeb-sosetizazibumex.pdfIn PDF document text
    • http://files.throughmonstrouseyes.com/uploads/1/3/1/6/131636903/4312ad71a06714.pdfIn PDF document text
    • http://files.msjacksonselementaryclass.com/uploads/1/3/1/4/131453894/2510759.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/1/0436/4143/8366/files/photosynthesis_and_respiration_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/terraria_cooking_pot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7492/9308/files/38372604682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/microelectronic_circuits_7th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/cake_mania_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/40598489156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/strona_bierna_angielski_czasy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2108/7398/files/las_clases_sociales_en_el_capitalismo_actual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7920/4006/files/17652828189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6265/6157/files/sukasukusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1733/1100/files/80203007944.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_off00004a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A87 5352 bytes
SHA-256: c776d67389c3cde233e3cc1c712913fc8e4a0e7e3c1a9030fb0a434fd3d92f9d
font_01_sfnt_off00005c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C80 9820 bytes
SHA-256: fa762f88986b772af5d04e597001da189ac09276e2f300ede5fbadcbaf03b8b9

Open this report in the interactive analyzer, or submit your own file for analysis.