Malicious PDF — malware analysis report

Static analysis result for SHA-256 712ed905458930ff…

MALICIOUS

PDF

46.4 KB Created: 2020-08-30 22:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbcaa60099f4390c5e0993faa08dd2d9 SHA-1: b17efa437d618ccd095ef90a3409d05c237bcfd9 SHA-256: 712ed905458930ff880f3b9289a563a35cbe045710dff21ef59ded367d130aea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used to disguise the true destination. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify-hosted PDFs. The document body contains text related to an 'ethiopian election debate' and a URL, likely an attempt to manipulate search engine results or lure users.

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.com/wix?keyword=2005+ethiopian+election+debate
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/misipukunimizakinolobiwun.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/xejulejome.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/cantos_para_el_nio_dios.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/29422554879.pdf
    • https://cdn.shopify.com/s/files/1/0435/3150/1720/files/seduis_moi_si_tu_peux_streaming.pdf
    • https://cdn.shopify.com/s/files/1/0457/8118/8774/files/indoor_air_quality_guidelines_and_standards_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/31740552424.pdf
    • https://cdn.shopify.com/s/files/1/0432/6126/4035/files/fallout_4_songs_diamond_city_radio.pdf
    • https://cdn.shopify.com/s/files/1/0466/8902/6212/files/77758503597.pdf
    • https://static.usrfiles.com/ugd/136d07_9aad24d6cab947fea006b0880b8fc2ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a9305f6588b4474adc7c5e9845fe4ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_e36b7e4a920346da937485d9921a63db.pdf
    • https://static.usrfiles.com/ugd/b8c837_782af9f86f0f42eb96f5965a607cb2f8.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/chess_free_for_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0436/8846/0441/files/number_guessing_game_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/estimation_of_hemoglobin_by_sahli_method.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_off00007796.bin
562766ff5b60d88bd206c830c990c4f99b10eddcf5b872056e8ea8068f6444c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7796 5328 bytes
font_01_sfnt_off0000899b.bin
ace78137be8e2e5c0d20d05314fd36cca5109676c85d3eb88b20d13aa06140be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x899B 10492 bytes

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