Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9a72d0c5fafb18…

MALICIOUS

PDF

67.9 KB Created: 2020-08-20 12:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 08379c1a50960eddb868d5f397c84165 SHA-1: 3dbb6b9ae9c8b51c570a31b02c0038f0f19b9a80 SHA-256: 1a9a72d0c5fafb18fc6ce72f5f58e1b2ed7ad533839e7828d7270cb7944f1cce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is used in conjunction with a link farm strategy. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=plant+cell+reports+review' and text related to "Plant cell reports review", suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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=plant+cell+reports+review In PDF document text
    • http://files.sassafrassugaringstudio.com/uploads/1/3/1/8/131856907/9909356.pdfIn PDF document text
    • http://files.vccburlington.org/uploads/1/3/2/7/132741556/7976703.pdfIn PDF document text
    • http://files.goodstuffprimaryresources.com/uploads/1/3/2/7/132712080/xapiga.pdfIn PDF document text
    • http://files.naturesjoint.net/uploads/1/3/0/7/130776206/e15dcafed4.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/1/0430/8022/0826/files/73906984138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9381/1619/files/livros_auto_estima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3551/5290/files/form_action_route_laravel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/calculus_graphical_numerical_algebraic_4th_edition_online_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8911/6840/files/download_essential_biology_textbook_for_senior_secondary_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/12889181637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0819/5736/files/brahmastra_advanced_maths_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/88049729518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/92923763129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9024/5787/files/25168081433.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
🗂 Part of campaign: naturesjoint.net 4 samples

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21B 3248 bytes
SHA-256: b081fe9a7222009ffb256b38b96689a8283a25d53badc19aff1876054c13cc5e
font_01_sfnt_off0000cdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBA 5080 bytes
SHA-256: 2b97e26573e03f28104c028f1939de1abbd8aaab424076107ec8e8fcbaf2f431
font_02_sfnt_off0000df1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 10256 bytes
SHA-256: e939bfa7045c22a044409e70a1aa569174ed5def2cae94db27b8d312bf528737

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