Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c0ac1c25dbde5c…

MALICIOUS

PDF

51.7 KB Created: 2020-08-29 13:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d36083c73f3db709454a1acd06df0111 SHA-1: 33429212b89642e95f4bb24cdce944f10a7e08fd SHA-256: d0c0ac1c25dbde5c7b730df4c541727755207d9e9eb6002fcd80f6d6a71161b5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, including one pointing to a known malicious redirector at 'https://ttraff.ru/wix?keyword=ejercicios+resueltos+de+probabilidad+binomial'. The document body, though heavily obfuscated, appears to contain text related to binomial probability, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious distribution pattern.

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.ru/wix?keyword=ejercicios+resueltos+de+probabilidad+binomial
    • https://cdn.shopify.com/s/files/1/0430/9699/8048/files/vovuwib.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/98540435225.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9509/files/video_player_for_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/18165275231.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/hvordan_kontanter_i_slv_sertifikate.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekutaxawiwasutoxojopelor.pdf
    • https://cdn.shopify.com/s/files/1/0429/6605/7116/files/hindi_item_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/domatitixevenima.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/what_is_coca_cola_s_slogan.pdf
    • https://cdn.shopify.com/s/files/1/0434/6888/2072/files/21017802444.pdf
    • https://static.usrfiles.com/ugd/b8c837_7de735733adc4339b613910783c9cdb1.pdf
    • https://static.usrfiles.com/ugd/f0e51d_071e869f409d4a1cb1f27bcf21e91a1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_25d561201ff24dad8cd0009667353c79.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d6759e29eed4ea8a56e2cfeeed540e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d92b88587ee450aaaa20a7ded358862.pdf
    • https://static.usrfiles.com/ugd/b8c837_7056f474405147048f057f18428ca38b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a8e558f2e084f9bbdb3e8fb9e034ad9.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff3186acd834b2e8529789e18225bd5.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_off00008169.bin
cf073a43e19d7f301fb204e37273df1a1e25d585f3c678bb05de4a9d4c3bfcbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8169 5392 bytes
font_01_sfnt_off0000939e.bin
ff84c01056b44edc22341232af2909a6b9a64b4a564625fe63a5aba9ae2352ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x939E 14056 bytes

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