Malicious PDF — malware analysis report

Static analysis result for SHA-256 044c66b96dd57065…

MALICIOUS

PDF

50.4 KB Created: 2020-09-06 06:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57adddb1b95defd59bbdbeab8120b550 SHA-1: cd4edae279f386598caeeebbf37617cdb8ab1d32 SHA-256: 044c66b96dd57065ae142d63b25439df159b81035e3521ca5def3bfb2b1cabdf
162 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 'https://ttraff.me/pify?keyword=tube+video+er+apk+full'. It also exhibits a PDF link farm heuristic, indicating an attempt to distribute or obscure malicious links. The ML classifier strongly flagged this PDF as malicious, and the presence of urgency language further supports a malicious intent. No scripts were extracted, but the primary attack vector appears to be a malicious link embedded within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.me/pify?keyword=tube+video+er+apk+full
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/renuzoxisegirarusajudiva.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/95550119255.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/xapefosudenogepiwasete.pdf
    • https://static.usrfiles.com/ugd/740d8c_7538a1c536a441cd8af650bf08386e51.pdf
    • https://static.usrfiles.com/ugd/f1780b_0f16933b84644e6f99419ee6fd9d55c7.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/nik_collection_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/magic_chef_oven_manual.pdf
    • https://cdn.shopify.com/s/files/1/0448/3615/9645/files/xumusaguw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/4791434854.pdf
    • https://cdn.shopify.com/s/files/1/0458/0799/2998/files/illicitly_information_definition.pdf
    • https://static.usrfiles.com/ugd/921909_7de6cf9f2798432fa3063202e3719d91.pdf
    • https://static.usrfiles.com/ugd/e56fe2_7fc760e37911437fae24ec491bc4fb4c.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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • 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_off0000599f.bin
edf517a561ed5132c6c1d5718ac6ff9d870a00e6f43a91762fd168a2279cca75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599F 6440 bytes
font_01_sfnt_off00006995.bin
26ff9d60f0fea4f2b3831a2b0600f8b8038b1ab9ecfe006eb6cafa329e4755ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6995 5068 bytes
font_02_sfnt_off00007ade.bin
aeee9b2fd577c594ede074a7e3493832e024aab8d381a7c1d16527c2e435dd06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADE 2252 bytes
font_03_sfnt_off0000851b.bin
0f9d7c6ed34728b1801ca5ad111097dbfec4412ddef41b9f116a3854e3e855a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x851B 9820 bytes
font_04_sfnt_off0000a6f8.bin
d36da4fd2ab8c4dd3ac6c046b788d156341ebfd1121c5e6b8b5107a79d777502		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F8 16080 bytes

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