Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1556683c9b4d12d…

MALICIOUS

PDF

66.8 KB Created: 2020-08-07 01:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57755c835f060a5b333050099c367fdc SHA-1: 4a3129ab6b823375dcbfcd8f4e60de1aa476e7b8 SHA-256: f1556683c9b4d12d8604f59832f344e052fbfca024481a661779729459223dc5
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one leading to a Shopify domain. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=quaternary+structure+of+protein+pdf', reinforcing the malicious intent.

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=quaternary+structure+of+protein+pdf In PDF document text
    • http://files.nelsonmassage.com/uploads/1/3/1/0/131069893/defbf05.pdfIn PDF document text
    • http://files.ironoakcanyonranch.com/uploads/1/3/1/4/131407361/9bba2a29.pdfIn PDF document text
    • http://files.mrviolinsd.com/uploads/1/3/1/6/131606762/4112552.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/1/0437/9151/5808/files/paxovubozit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/incidencia_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3598/9915/files/30750782603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7583/6835/files/cancionero_con_acordes_de_guitarra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2831/5288/files/60498221122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/5186/4484/files/ain_t_no_sunshine_lyrics_and_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/c_class_header_file_and_implementation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2290/1663/files/18221994380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0655/7347/files/carcinoma_pulmonar_tratamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/64250897268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9136/5792/files/effects_of_soil_pollution_on_animals.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 4

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_off0000c7be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BE 5280 bytes
SHA-256: 8a670f0b7b18ba1f739b94678d96db39025a2d07eed180724abc9befedf11b1f
font_01_sfnt_off0000d9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CC 10612 bytes
SHA-256: eec12873385a5a235de442e6fdb2b1fa702c2ff50dedee51850fed9082573d4e

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