Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22841d077c52020…

MALICIOUS

PDF

42.3 KB Created: 2020-07-10 06:39:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 8e94c7db3628b5e07002f5120cfb63e9 SHA-1: f545df3db3b14926544e5ca3979607cb2741c356 SHA-256: c22841d077c5202078e6eabea120ef3cb9e610adb7aa6320e260e93f4cfa744e
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a link farm. One critical heuristic indicates a malicious redirector link, and another identifies a mass external PDF link farm. The document body contains the keyword 'Synchronous reluctance motor design pdf' and numerous URLs, suggesting a lure for SEO manipulation or to distribute further malicious content. No scripts were extracted from this sample.

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.ru/wb?keyword=synchronous%20reluctance%20motor%20design%20pdf In PDF document text
    • http://files.psyched-online.com/uploads/1/3/1/4/131483185/29d2c58de9e5e0e.pdfIn PDF document text
    • http://files.mycarnabyscooter.com/uploads/1/3/0/7/130738596/8741353.pdfIn PDF document text
    • http://files.sigmachapter.org/uploads/1/3/0/8/130873951/gonixebonit_bunirema.pdfIn PDF document text
    • http://files.sleepyeyechamber.com/uploads/1/3/0/7/130775633/busarobose-xepiwasu-gipoli-kojadaxodemo.pdfIn PDF document text
    • http://files.kimsfdldesigns.com/uploads/1/3/2/6/132695883/javoperurut-wuzuv-bisigazevapeb-fesiwowamugalun.pdfIn PDF document text
    • http://files.ejacts.com/uploads/1/3/1/3/131384018/givebivusunilujogoj.pdfIn PDF document text
    • http://files.beddru.com/uploads/1/3/1/4/131405940/3529333.pdfIn PDF document text
    • http://files.alissaellisphd.com/uploads/1/3/1/4/131452827/844207.pdfIn PDF document text
    • http://files.nicolehoekstra.com/uploads/1/3/1/0/131069812/60a07.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://joselolede.files.wordpress.com/2020/06/63707745903.pdfIn PDF document text
    • https://bidazinefak.files.wordpress.com/2020/06/letazuwelo.pdfIn PDF document text
    • https://xokapuv.files.wordpress.com/2020/07/silep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76410179135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigorekotat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66048758492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mesibilefonupas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.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_off0000675c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675C 5656 bytes
SHA-256: adbc8796fab54aa0e68694e0f1c1c1dc933d3f66c170702565d112dbd36f4513
font_01_sfnt_off00007a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A64 9928 bytes
SHA-256: c5483489be111c43b2724fac22108656bc50edefbf30dec75108ac05cdc7c2a5

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