Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c4e5d1dd0ee278…

MALICIOUS

PDF

48.2 KB Created: 2020-08-31 11:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2638b78d3e003ea424fecc34472efe8 SHA-1: e73a6bc374e6cd6c856bc6009718d5156a369568 SHA-256: 69c4e5d1dd0ee278c1efe62b38be3bf748b378763fa1d816effc544ee35fd4cc
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.cc/wix?keyword=blue+bossa+lead+sheet. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The presence of a 'download button' lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=blue+bossa+lead+sheet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_c1c9d490aab846f5b80f94d44adeccb7.pdf
    • https://static.usrfiles.com/ugd/429b25_671b8f677b274b0592513c16ebe0642d.pdf
    • https://static.usrfiles.com/ugd/b8c837_88a785bdd1dd48a7bb11b551711a20dc.pdf
    • https://static.usrfiles.com/ugd/a640e9_00019a0d51db40cfa9599a9a6d19101f.pdf
    • https://static.usrfiles.com/ugd/accd1f_9bc0d15afe924929990c3e108c9d1c65.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/dota_1_invoker.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/12515435694.pdf
    • https://static.usrfiles.com/ugd/90c678_9844b136f63244aaadccffabb032b503.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_5ef435d6e40a40f5a407dedd88eee3aa.pdf
    • https://static.usrfiles.com/ugd/12f4eb_49f3d7bc7f514048a69a292b94b20758.pdf
    • https://static.usrfiles.com/ugd/197ed4_f8ec0b67daa245669f94691121783b33.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/angina_estvel.pdf
    • https://cdn.shopify.com/s/files/1/0433/5140/8799/files/monster_dichotomous_key_worksheet_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000643b.bin
2203f3eba0ef3d35af76e44ea1fa12800cdafc19cb3a470dce5085f0bdf856c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 5008 bytes
font_01_sfnt_off00007531.bin
f84f0a0e285c18568a84a520ba9325ca207f920e9f87c0538e0641e587074743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7531 13048 bytes
font_02_sfnt_off00009f35.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F35 16120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.