Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0fe851f56807a28…

MALICIOUS

PDF

55.7 KB Created: 2020-08-24 06:24:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4bcb0b502f0d9162937b50bfb09a786c SHA-1: 73176503a56a28b4da513281f4d487142c8d0a39 SHA-256: b0fe851f56807a28befb534ad83841a99f730ce9480c25a1a659de01bab4daaa
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, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The primary malicious URL is https://ttraff.cc/pify?keyword=antisepsia+intestinal+pdf, which likely serves as a lure to a malicious site.

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.cc/pify?keyword=antisepsia+intestinal+pdf In PDF document text
    • http://majefijus.thesprightlymovement.com/uploads/1/3/1/1/131163846/xikiborakoxufi.pdfIn PDF document text
    • http://files.melitaharvey.com/uploads/1/3/1/1/131164081/xaxuzizi_xipufuvevezona_zoravojon.pdfIn PDF document text
    • http://files.productionsbymk.com/uploads/1/3/1/3/131383760/mogixetizotomevigut.pdfIn PDF document text
    • http://files.thewaveindustries.com/uploads/1/3/1/4/131413837/a1b902b2.pdfIn PDF document text
    • http://files.katascuba.com/uploads/1/3/1/4/131483253/5349126.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/1/0432/3934/2247/files/approaches_to_the_study_of_political_science_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3080/4637/files/jcps_school_calendar_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8721/7311/files/suseganaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8845/2515/files/kagasagen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/home_interior_design_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/lanif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6146/8567/files/20999421854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3252/7526/files/walmart_sheets_twin_xl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/wiwivudijuwuwigijap.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_off00009df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF5 4928 bytes
SHA-256: f89452ab35de7b8a4601040b39aaa071392e3f05dfe0a621b62099d45b9a9b09
font_01_sfnt_off0000aec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC8 10388 bytes
SHA-256: ad81fd436af01b4e2a6fbd3a0aacff77d64ea29077161f92bded3aef1dd5d62d

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