Malicious PDF — malware analysis report

Static analysis result for SHA-256 643f74634e8acf6a…

MALICIOUS

PDF

45.2 KB Created: 2020-08-08 08:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 309e33a2454be57a5d6116781ca76208 SHA-1: 03abbff2385a1e2dddf32a8260960e8c7fd46b18 SHA-256: 643f74634e8acf6abd812f926db2b11c0dd8ed59a84e80286f0bb8fe0ca1f0c6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a malicious redirector and part of an SEO link farm, designed to trick users into downloading content. The embedded URLs, particularly the one pointing to 'ttraff.cc', are identified as malicious redirectors. The document body, though heavily obfuscated, contains URLs that are part of this redirection scheme, suggesting an attempt to deliver a second-stage payload or phish for information under the guise of providing a free textbook.

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=irrigation+and+water+power+engineering+textbook+pdf In PDF document text
    • http://files.pannypointcondo.com/uploads/1/3/0/9/130969925/ragonugoderaputiga.pdfIn PDF document text
    • http://files.theoldeschoolhouse.com/uploads/1/3/2/7/132741302/bixetekafomunuvaxuk.pdfIn PDF document text
    • http://files.westtexascremation.com/uploads/1/3/0/7/130776211/6183028.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/1/0428/9835/8432/files/35022180152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8790/5446/files/lizuluzikuwino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5957/6986/files/business_studies_grade_10_essays_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3139/5478/files/13165682581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/91360851500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/babowosikiteze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0917/1879/files/56452007234.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9341/7366/files/rigosavegoketefugebikivub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/25458095052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6525/2771/files/architectural_working_drawings_residential.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/direzulizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/29004598833.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B11 5300 bytes
SHA-256: 1484d523bb51b3df8fc2a47d3334b18532b2733d8f7a35757119435f48d01f0b
font_01_sfnt_off00006d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D38 2116 bytes
SHA-256: 89454d8ece1be00d2333aac76955f46ed17c4d141322e635bf27f42efb43e54e
font_02_sfnt_off00007704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 14992 bytes
SHA-256: 554cc245e440f89cbc4d18644b8496dad1e04911f44b2cfb14232041f70f5353

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