Malicious PDF — malware analysis report

Static analysis result for SHA-256 31dbe48620a2baa2…

MALICIOUS

PDF

54.7 KB Created: 2020-08-20 00:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c780757a17b66d2171005e3869bf745 SHA-1: 2fb399cb376b596900147a7b75a9ca45d0f997a5 SHA-256: 31dbe48620a2baa2f8328c8db4bd3efd9ed906a357aa4e7278b6336cda183cff
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL. This suggests the primary purpose is to lure users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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.cc/pify?keyword=avascular+necrosis+of+femoral+head+treatment+pdf
    • http://files.mabsatomicmustard.com/uploads/1/3/1/4/131438055/xivinorupob.pdf
    • http://files.jemun.net/uploads/1/3/1/4/131437538/zimef-pafitakimu-kazuwapofi-xefulogekasa.pdf
    • http://pidowin.harbourhealthandwellness.com/uploads/1/3/0/8/130874474/vidumuzapigop.pdf
    • http://vuzedi.sdsuzukiinstitute.com/uploads/1/3/0/7/130776031/geganukazumax.pdf
    • http://simifa.dursleymalechoir.org.uk/uploads/1/3/0/7/130739629/4d21ca877.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/sqlite_format_datetime_timezone.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/52712979996.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/tivunilexut.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6899/files/rivukepi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3771/9717/files/nikola_tesla_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3566/files/galveston_fishing_report_for_today.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4248/files/android_game_hacking_tools.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/xuxixegizedezulef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/ejercicios_present_perfect_simple_just_yet_already.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/rofudakud.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_off000097e6.bin
63978ce33764eed5bbb3f699d38a9a4a08e2a768ea8ce6ce25cdac058d81c7cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E6 5444 bytes
font_01_sfnt_off0000aa39.bin
1bc31ad5ee49274466d81d49b870674bf7440b5a1e81344c979d8384cd3eab18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA39 10252 bytes

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