Malicious PDF — malware analysis report

Static analysis result for SHA-256 41099dcb8424bd1d…

MALICIOUS

PDF

39.7 KB Created: 2020-07-19 18:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 5abafafb4a05e79606e15b2387bc5eb3 SHA-1: 72429734de449d1a91e785d48139b6b42fa82dbf SHA-256: 41099dcb8424bd1d3e459f31d7c478be4e2d1f0e52103325cf4ff08bc1ad068f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

This PDF document functions as a link farm, directing users to numerous external websites under the guise of providing information related to 'atomic structure questions answers for neet pdf'. The primary URL, https://ttraff.ru/wb?keyword=atomic%20structure%20questions%20answers%20for%20neet%20pdf, is identified as a malicious redirector, indicating a clear intent to lead users to harmful content. The document's structure and the presence of multiple outbound links strongly suggest a phishing or malicious redirection attack.

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=atomic%20structure%20questions%20answers%20for%20neet%20pdf In PDF document text
    • http://files.berkshire-epc.co.uk/uploads/1/3/0/8/130873979/nosufokawifiv.pdfIn PDF document text
    • http://files.mandokidslearning.com/uploads/1/3/1/3/131380870/linufike-dosumofati-vuratekodakuf.pdfIn PDF document text
    • http://files.greencoreelectric.com/uploads/1/3/2/6/132681392/6393879.pdfIn PDF document text
    • http://files.atelierbe.com/uploads/1/3/0/7/130739596/8227cb1c60082.pdfIn PDF document text
    • http://files.happenstancebordercollies.com/uploads/1/3/0/7/130739558/xibagamibexojev.pdfIn PDF document text
    • http://files.reneesgourmetpizzeria.net/uploads/1/3/2/3/132302848/42d904a6a35282.pdfIn PDF document text
    • http://files.calibrebeer.com/uploads/1/3/2/6/132696171/1468570.pdfIn PDF document text
    • http://files.northshorerhythmics.com/uploads/1/3/2/6/132695714/5442721.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gopixur221482700.files.wordpress.com/2020/07/72837807062.pdfIn PDF document text
    • https://gepuguxiro.files.wordpress.com/2020/06/94218870256.pdfIn PDF document text
    • https://xudevibe.files.wordpress.com/2020/06/52011397944.pdfIn PDF document text
    • https://zitexop.files.wordpress.com/2020/07/42627561067.pdfIn PDF document text
    • https://wubatelevad.files.wordpress.com/2020/06/ganogaxukebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/97082287689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3848/1320/files/61886161689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0337/8839/files/56663611543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/87164876941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/zumijizofolamovekej.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD1 5356 bytes
SHA-256: 7daa319472d6c081fa1b1d089e5dc2f1629fb3bf10bd5e246118d7ff35694adc
font_01_sfnt_off00006efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 10016 bytes
SHA-256: 904ddd47820da89e66897b89219c65eedb7e62e321b495135b6ba5420831833e