Malicious PDF — malware analysis report

Static analysis result for SHA-256 45300e76c50ea435…

MALICIOUS

PDF

38.8 KB Created: 2020-07-08 12:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 83ac80dee95085ec6500905ba573393e SHA-1: f6c8bc17825fa28096ffe5d3daf8130942a663eb SHA-256: 45300e76c50ea435231d1e4d179231362a78465bc44599ee02d554a98b30a06d
184 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, suggesting a phishing or credential harvesting attempt. The document body text, though heavily obfuscated, includes the phrase 'Atp adp cycle worksheet key' and the malicious URL, reinforcing the lure. No scripts were extracted, but the presence of multiple PDF links points to a technique of overwhelming search engines or users with content. The primary malicious URL is https://ttraff.cc/wb?keyword=atp%20adp%20cycle%20worksheet%20key.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=atp%20adp%20cycle%20worksheet%20key In PDF document text
    • http://files.theblushersmanual.com/uploads/1/3/1/4/131437753/xemawativa-fizifikafibafe.pdfIn PDF document text
    • http://files.klemonshealthcareconsulting.com/uploads/1/3/1/4/131453560/d9802c2f758aea.pdfIn PDF document text
    • http://files.sapcrc.com/uploads/1/3/0/7/130775867/a49b304e84.pdfIn PDF document text
    • http://files.bookhivebeerclub.com/uploads/1/3/0/9/130969910/f65beae6b726.pdfIn PDF document text
    • http://files.dlfinancial.org/uploads/1/3/1/3/131379749/tobij.pdfIn PDF document text
    • http://files.fnaq.org/uploads/1/3/0/9/130969944/nivubuluro.pdfIn PDF document text
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdfIn PDF document text
    • http://files.benbrookbobcatband.com/uploads/1/3/2/6/132696263/6240448.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pawojoteloje.files.wordpress.com/2020/06/50962779677.pdfIn PDF document text
    • https://numewim.files.wordpress.com/2020/07/xefeganenexok.pdfIn PDF document text
    • https://tefujus.files.wordpress.com/2020/06/sasorisamikaf.pdfIn PDF document text
    • https://pamilegimo.files.wordpress.com/2020/07/12075866401.pdfIn PDF document text
    • https://ralidirudod.files.wordpress.com/2020/07/37337899133.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_off00005af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF3 5040 bytes
SHA-256: a4bcdb0a15762c569c05ecc0c4dbdaa22efce7b237c847781059e9d9621e1f49
font_01_sfnt_off00006c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C38 10372 bytes
SHA-256: 89b4d19e5abd40db07a91ef56ae46c86f7cc18665a2c7d94efc93d1f784ab40d

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