Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c4a55c411554cc…

MALICIOUS

PDF

54.9 KB Created: 2020-08-31 06:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5cacf638dfd8a700f67692df01cefd8 SHA-1: c16de4d10b37d0a66b823913f627fc13cc423a11 SHA-256: 85c4a55c411554cc0c957aa5be0f46820128e17631e3f79a5d010defc37b10c8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to improve search engine ranking and drive traffic to malicious sites. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to further malicious content.

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=livre+recette+multicuiseur+philips+p
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/6723/5742/files/steps_of_polymerase_chain_reaction.pdf
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/rigixipofokikunarasos.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/5291073726.pdf
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/detroit_become_human_android_name_generator.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/bekobumikuxobewesoposudul.pdf
    • https://static.usrfiles.com/ugd/b8c837_f17c6554e1ce4a27b2ea7a8688aa29ca.pdf
    • https://static.usrfiles.com/ugd/575363_6899158410984be3900b6a91d4c8655e.pdf
    • https://static.usrfiles.com/ugd/575363_0a1ad604cf5c4380ba0562834dadce03.pdf
    • https://cdn.shopify.com/s/files/1/0430/3182/2485/files/collection_book_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/1851/0745/files/biduvob.pdf
    • https://cdn.shopify.com/s/files/1/0436/1800/9251/files/acero_inoxidable_grado_alimenticio.pdf
    • https://cdn.shopify.com/s/files/1/0431/5342/4540/files/vomikomijigamar.pdf
    • https://static.usrfiles.com/ugd/48f461_5d7f8721161b4b3186e1ddd983fd20f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_f899fa53e45e4553b2cf508388380be2.pdf
    • https://static.usrfiles.com/ugd/5a1791_010122c0085b4ede85fe8c50d33a8428.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7fba31c2a3044cb83aa9e443b0decf3.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e3537f3090f4edbaf929c0d4e6f02a9.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ee.bin
5404bfd3c490832ca0b1a02cec930eef4deb7df1fb4d0a72aabb57e5dc429bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EE 4628 bytes
font_01_sfnt_off000078a6.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A6 1800 bytes
font_02_sfnt_off00008134.bin
23d4911595cfff1a6366e0d671ffc0d0c3158af4500deb45532bbc97fad63874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8134 11792 bytes
font_03_sfnt_off0000a699.bin
f51058d46f38225b3f8ec207538d1fc5a11e07a9e55e19c1847b5df11b970cd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA699 16752 bytes
font_04_sfnt_off0000bdad.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAD 4324 bytes

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