Malicious PDF — malware analysis report

Static analysis result for SHA-256 b281ff0bc80575a1…

MALICIOUS

PDF

41.3 KB Created: 2020-08-26 09:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77c4314661f944059b0d29310013ad9b SHA-1: 2061f4ef2f40098bada7a719fa4d0b065758bf33 SHA-256: b281ff0bc80575a1077479f7f24c5b2d4e1079c0de7a0a5991b0e074a6a5541f
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.com/pify?keyword=guia+abc+de+microbiologia+pdf'. This suggests the document is designed to lure users to malicious websites under the guise of providing academic content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Heuristics 3

  • 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.
  • 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=guia+abc+de+microbiologia+pdf
    • http://rarip.rhsbulldogband.org/uploads/1/3/1/8/131856917/dudozudoraw_tuxure_tipex_rakinixudafupa.pdf
    • http://files.onesquareworld.org/uploads/1/3/0/7/130740011/zilopafenuvosekin.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6600/files/56217142005.pdf
    • https://cdn.shopify.com/s/files/1/0429/1038/4295/files/arya_movie_songs_naa_songs_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/xokumikijamemudita.pdf
    • https://cdn.shopify.com/s/files/1/0434/2225/3208/files/popubagaginonobokopamaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/40984573428.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9443/files/whatsapp_status_er_apk_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/lepaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9065/6921/files/rupawozenugadam.pdf
    • https://cdn.shopify.com/s/files/1/0441/1038/1208/files/peptic_ulcer_types.pdf
    • https://cdn.shopify.com/s/files/1/0462/7827/9317/files/maya_ascii_file.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0735/files/72671181978.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/17624029563.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005efd.bin
d6b46567383defa51ed27fc104c49bfa0483a9c3155f5485741a997b7b0e38d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFD 5468 bytes
font_01_sfnt_off00007180.bin
47f2c72ebe38f2cc34e823b25e6d15914532857cff68af67cc83bf9d3a3e884e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 12072 bytes

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