Malicious PDF — malware analysis report

Static analysis result for SHA-256 13b197968f052bcf…

MALICIOUS

PDF

58.2 KB Created: 2020-07-09 05:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 9db68179295d11d4a950774a06f5753c SHA-1: 4fa42301f1e9049af86bc778c837bd20314b8b9c SHA-256: 13b197968f052bcf18d7ed12d92c4a019b46e3952637a2804fe9e145f9e288bc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file functions as a link farm, containing numerous links to external PDF documents. One of these links, 'https://ttraff.cc/wb?keyword=2018%20volkswagen%20passat%20manual%20transmission', is identified as a malicious redirector. The ML classifier strongly indicated maliciousness, and the presence of a redirector suggests an attempt to lead the user to malicious content, likely for exploitation or further malware delivery.

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=2018%20volkswagen%20passat%20manual%20transmission In PDF document text
    • http://files.nicoledanesi.com/uploads/1/3/1/4/131408913/552010.pdfIn PDF document text
    • http://files.illuminat.co/uploads/1/3/1/8/131858287/fokawiwixupetimo.pdfIn PDF document text
    • http://files.emmauswellbeingmatters.com/uploads/1/3/1/4/131405940/3355321.pdfIn PDF document text
    • http://files.whatchelseaswatching.com/uploads/1/3/1/6/131606395/5436943.pdfIn PDF document text
    • http://files.djmoosetrax.com/uploads/1/3/1/4/131483440/fuboguvasuk.pdfIn PDF document text
    • http://files.threefeatherstheatre.com/uploads/1/3/0/7/130739069/59363baf0.pdfIn PDF document text
    • http://files.avenamedical.com/uploads/1/3/2/6/132680852/numojex.pdfIn PDF document text
    • http://files.afmsupplements.com/uploads/1/3/2/3/132302815/972851.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wufubupaku.files.wordpress.com/2020/06/89058627989.pdfIn PDF document text
    • https://warezofokel.files.wordpress.com/2020/06/82586249362.pdfIn PDF document text
    • https://rofatekarem.files.wordpress.com/2020/06/55489678430.pdfIn PDF document text
    • https://zokejepu.files.wordpress.com/2020/07/kigevufalefiwawegakazox.pdfIn PDF document text
    • https://zatulosevu.files.wordpress.com/2020/07/fewajukewup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59854739703.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000868c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868C 5664 bytes
SHA-256: e1e67008b1cc3ca47c6f4ce8513dd69d2972fdeb10e19bcabba592683603a19b
font_01_sfnt_off000099c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99C2 14140 bytes
SHA-256: c75e1df1a1975a9b192813a71a5e9775a817c0b09af7fd4a81a84cff8b164878
font_02_sfnt_off0000c678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC678 16060 bytes
SHA-256: 84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727

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