Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1887d2ffa0dd69…

MALICIOUS

PDF

35.2 KB Created: 2020-07-10 22:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 76bef9c17260bc71c4a230e43b429055 SHA-1: 37900d9504dbaece9cd416d024c10408203857ea SHA-256: 7b1887d2ffa0dd69de44a9664d4e82495da02dda87b6aa21d8756d57f5f02466
184 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable domains and appear to be part of a link farm. One of the primary links directs to a known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs that are also present in the link farm.

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.com/pify?keyword=mercedes+a+class+saloon+brochure+pdf In PDF document text
    • http://files.globalisationandcities.com/uploads/1/3/1/6/131607174/jilaxafufusekiw.pdfIn PDF document text
    • http://files.ericeklecoaching.com/uploads/1/3/2/3/132303007/8581095.pdfIn PDF document text
    • http://files.kitchen2boardroom.com/uploads/1/3/1/3/131380875/6547407.pdfIn PDF document text
    • http://files.tukteacompany.com/uploads/1/3/1/4/131411539/4526419.pdfIn PDF document text
    • http://files.credorecoveryministry.org/uploads/1/3/1/1/131164204/vitefadimivu.pdfIn PDF document text
    • http://files.goldentreasureretrievers.com/uploads/1/3/1/3/131398252/2918990.pdfIn PDF document text
    • http://files.subtek-music.com/uploads/1/3/1/8/131858975/7337809.pdfIn PDF document text
    • http://files.contemporary-flair.com/uploads/1/3/2/3/132302998/vakinuw.pdfIn PDF document text
    • http://files.tinagutierrezartsphotography.com/uploads/1/3/0/7/130775383/remax-taxopugazaledu-fuluxibejurifuj-lavosiraleset.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://borakav.files.wordpress.com/2020/06/31856906881.pdfIn PDF document text
    • https://kugedabi.files.wordpress.com/2020/07/kakerazedoxomelido.pdfIn PDF document text
    • https://nijopudu.files.wordpress.com/2020/07/36473774204.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70354855800.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejupabofutub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/tanovumobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6190/3517/files/48972441115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/74662378065.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_off00004dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD8 5140 bytes
SHA-256: ec8ac7867bbece8ffc29fd753198809baccc5c003915ce781825c9911742f843
font_01_sfnt_off00005f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3C 9576 bytes
SHA-256: 8b87f306d62055b88d2e91fcce8abd995ff5e179ba164543e391319588be6a49

Open this report in the interactive analyzer, or submit your own file for analysis.