Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69881c58b96a540…

MALICIOUS

PDF

42.8 KB Created: 2020-08-11 23:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9190fe7c2428d475561e82de0ad6c1d6 SHA-1: aaa1417b846283940070adfad9dd8cf021278d96 SHA-256: b69881c58b96a5401fb3ab23c81051e4adc0242b1f4c4cb51423b4819d19a337
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 external links, with a critical heuristic firing indicating a PDF link farm. One of the primary links points to a known malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL, suggesting an attempt to lure users to malicious content or manipulate search engine rankings.

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.ru/pify?keyword=add+blank+page+to+pdf+itextsharp
    • http://files.superiormachineandfab.com/uploads/1/3/2/8/132815154/5810631.pdf
    • http://files.rogersranch.org/uploads/1/3/1/0/131069950/11800f362c191dc.pdf
    • http://vafoz.1songproductions.org/uploads/1/3/1/6/131607163/weridamo-xenobavulu-pubat-gozegogo.pdf
    • http://files.feedmeupdelivery.com/uploads/1/3/1/4/131453354/7459404.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/ritirumafun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/29628402643.pdf
    • https://cdn.shopify.com/s/files/1/0433/2814/3510/files/boardman_22_function_bike_computer_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0434/0544/3233/files/namibi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/exercices_corrigs_barycentre_seconde.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/masewusomarewisu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/puritan_bennett_840_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/86368761182.pdf
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/turusolape.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/surah_al_kahf_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/los_emisarios_alvaro_mutis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38608120386.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_off00006142.bin
fe3860398ecf6e8a57372f28529c7397dbeab7d33a304f1ec02f14c7aba04a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6142 5564 bytes
font_01_sfnt_off00007430.bin
d51a05f8cd3153ae13440ad0cf5c47274a0e096b3edb9d3d192dc153def010e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7430 13236 bytes

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