Malicious PDF — malware analysis report

Static analysis result for SHA-256 d833147e0f9b17e3…

MALICIOUS

PDF

37.4 KB Created: 2020-08-12 06:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f560053236f34d505afc8cbfdf49c3c SHA-1: 7282159659549edf661bf17d62ce93e72c2a9ca9 SHA-256: d833147e0f9b17e3328e646961826c5b43bc44de58f99cb445cfffd73e9a79a3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, which points to ttraff.com. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a transcription practice worksheet. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO poisoning attempt to distribute malicious content.

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=transcription%20practice%20worksheet%20answers In PDF document text
    • http://files.grandbendsoccer.ca/uploads/1/3/1/8/131871894/mirelukexuger.pdfIn PDF document text
    • http://files.kateloganbeauty.com/uploads/1/3/0/7/130775665/611302e.pdfIn PDF document text
    • http://kokofe.hoodoohealing.net/uploads/1/3/1/4/131483138/5220074.pdfIn PDF document text
    • http://files.isme-conferences.org/uploads/1/3/0/7/130775707/nuteketatos.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/1/0431/6656/4507/files/temuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/83230606053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/litovezekowureka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/dictionary_of_civil_engineering_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/pagapogodirilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/88767781706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8382/4294/files/anti_arthritic_activity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/dijunom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/abcd_malayalam_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84511803825.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000567e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x567E 5096 bytes
SHA-256: c558b26ffe20df555d75bfe2a8e0c0bb41dd58aa17a0b2276bd02352777e5f86
font_01_sfnt_off000067d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67D5 9644 bytes
SHA-256: 5dd6321217d31ea6b59bf2d5235cd45d9ed2f4ce6e7b0390ab6a649e51a04a39

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