Malicious PDF — malware analysis report

Static analysis result for SHA-256 6620c40a010efdd0…

MALICIOUS

PDF

39.9 KB Created: 2020-09-01 19:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d4c186f8110b6f638d505d62cf8bc21 SHA-1: 82c9af45a395d481665b7621c54c2219f18e7493 SHA-256: 6620c40a010efdd06b7ed91bfecbba0e007af8a18f9b8787fd63e069352b0817
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, which is part of a link farm designed to lead users to various PDF documents. The document body mentions 'Airbnb pitch deck', suggesting a lure to entice users to click the malicious link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.club/wix?keyword=airbnb+pitch+deck
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5430/9280/files/10121730862.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2284/files/lagubolegap.pdf
    • https://cdn.shopify.com/s/files/1/0440/4002/8325/files/marie_kondo_folding_fitted_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0445/6418/5247/files/amar_ujala_news_paper_today_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8106/files/tuzefedobafube.pdf
    • https://cdn.shopify.com/s/files/1/0430/4663/3621/files/sanakobilebifiwufobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/calendario_escolar_sep_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/newixigewejiviroxasuta.pdf
    • https://static.usrfiles.com/ugd/4c76bf_67b2f733d8f9475d8ef93b3291a44fd5.pdf
    • https://static.usrfiles.com/ugd/eb5a6a_f033d260924e45909af1f1401ecf1cde.pdf
    • https://static.usrfiles.com/ugd/ac72e0_faff22dc5cee47ddb9e234923f49138f.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f4b.bin
5b8416fa7b61c73538daf4c3c45f5a95ddb5062f0dae069987b3d90be7708a17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4B 4932 bytes
font_01_sfnt_off0000700b.bin
04333e663273d75bc8b13ba6be29900557a6a8e6d1653f19c0fb7ce90af41802		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700B 10332 bytes

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