Malicious PDF — malware analysis report

Static analysis result for SHA-256 027f93b87fc868a8…

MALICIOUS

PDF

35.0 KB Created: 2020-08-28 07:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8a27f71b499db9bffe285aa2c191acb SHA-1: 088c7b2686f85248233079d2cadbe9bca8a2cc36 SHA-256: 027f93b87fc868a8a2a006789ebca92ede8e097767366a7df9d3c2829f358326
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and other benign-looking PDF links, suggesting a link farm or phishing lure. The presence of a malicious redirector and a high ML classifier score indicate a high likelihood of 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=preterite+tense+in+spanish+worksheets In PDF document text
    • http://files.sectournaments.com/uploads/1/3/1/4/131452942/duzidakiwir-lewov-namel-ganamuda.pdfIn PDF document text
    • http://kijopobo.kellymichellebaker.com/uploads/1/3/0/8/130874679/5673650.pdfIn PDF document text
    • http://files.weatherfordobgyn.com/uploads/1/3/0/7/130739398/90048.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/1/0432/1057/1940/files/bjp_candidate_list_2020_maharashtra_election_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/35730894768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/dunojawan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8379/0491/files/student_exploration_calorimetry_lab_answers_activity_a.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90262961418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/90675853847.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/kegujexiguwazob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/license_plate_template_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9021/3019/files/amrita_nayak_new_odia_song_2019.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_off00004af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF9 5032 bytes
SHA-256: 5afcfe1906007745c2ebcdc2ddf168f9f625320db5babf6c708e9b235d08aa31
font_01_sfnt_off00005c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C15 10300 bytes
SHA-256: bb87f6459db6771789d8bd0c3e46f233a3fec65b3ef3f6d47df7dd026d9b9274

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