Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce3085303de048f…

MALICIOUS

PDF

40.4 KB Created: 2020-07-09 14:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 02a0d32d855e722cbe0a477a4bb901fb SHA-1: 32ca14ab5a6c4dfaddf5b4c3a92d29f20d9e7bfa SHA-256: 3ce3085303de048ff9daef3a87dc9e7742c86ff1a730ee25fe2a3a644a652146
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, identified as a link farm, with one specifically pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users into clicking these links, which likely lead to malicious websites or phishing pages.

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/wb?keyword=ecosystem%20biotic%20and%20abiotic%20factors%20pdf In PDF document text
    • http://files.vapath.org/uploads/1/3/1/4/131409709/6197041.pdfIn PDF document text
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdfIn PDF document text
    • http://files.twistedclovers.com/uploads/1/3/0/7/130739503/muzoluzo-dofozog-pawavubuweve.pdfIn PDF document text
    • http://files.duanebrownlaw.com/uploads/1/3/1/4/131483253/2887604.pdfIn PDF document text
    • http://files.mtalphacycling.org/uploads/1/3/2/6/132681690/vonup-jugolepixijaven-powize-ruvoret.pdfIn PDF document text
    • http://files.annaboldina.com/uploads/1/3/1/3/131379680/depebug.pdfIn PDF document text
    • http://files.well-estar.com/uploads/1/3/1/6/131637034/91a0067.pdfIn PDF document text
    • http://files.freedomvalleyfarm.com/uploads/1/3/1/3/131382320/5470ef4bf0.pdfIn PDF document text
    • http://files.ultimategymsports.com/uploads/1/3/1/6/131606619/nisozofivo.pdfIn PDF document text
    • http://files.trustonyu.com/uploads/1/3/1/4/131452778/sivaleserilis-xakib-nidofek-diwobipezavib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sebokufani.files.wordpress.com/2020/07/60451059140.pdfIn PDF document text
    • https://puxefijo.files.wordpress.com/2020/07/56867839488.pdfIn PDF document text
    • https://lasogotunule.files.wordpress.com/2020/06/buvakoxuvebenis.pdfIn PDF document text
    • https://vonewoxad.files.wordpress.com/2020/06/bodegevenoxazodigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dosodasanofesawule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kopamidije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62222626122.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_off00006234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6234 5256 bytes
SHA-256: d6957824e7069442a187b83963ebd9effd24272c7e2003988cf5268949b507b3
font_01_sfnt_off000073f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 9508 bytes
SHA-256: 8879fd442e56ff77a622f15dcc0c3470dd861f7c641c1480f9b9e81c3314901e

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