Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2e247436dfc983…

MALICIOUS

PDF

53.1 KB Created: 2020-08-17 14:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d8406458b4971dea07a4ea117cd33be SHA-1: eefd8b4d1f5d8e9102ecb9d53a1ba8aa0a3a9de2 SHA-256: ed2e247436dfc983cda9bf484592d1ae6bd86abb603fbcc6fd82d2891b292696
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=msrtc+advertisement+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, some of which are hosted on potentially untrusted domains. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to lure the user to this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=msrtc+advertisement+pdf In PDF document text
    • http://files.metoomining.com/uploads/1/3/0/8/130814601/3efdc9b45.pdfIn PDF document text
    • http://memijov.edmontongreendragon.ca/uploads/1/3/0/8/130813528/fufukediriw-potazifif-jagosuleka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/application_letter_sample_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0321/3984/files/95282406324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1391/2222/files/cheap_mp3_downloads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/cell_structure_and_function_worksheet_crossword.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/wasif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/83835549913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/dokobij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8867/4967/files/56647483787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8541/files/system_service_exception_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2347/3568/files/royalty_free_acapellas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/51637102757.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000809a.bin
6f382d5ee122c1be84d8d99f88a123c1041ee04613ede9ce74eac57d1f99c32c
pdf-font-stream PDF embedded font (sfnt) at offset 0x809A 5332 bytes
font_01_sfnt_off000092b2.bin
74e0141d730508ee6ca9ddec30ca7fb7ed4a6cd6611a65edca3aa1e4373a66fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x92B2 10876 bytes
font_02_sfnt_off0000b7e6.bin
0f14a6936955bdee084f1ba76b134a2047337bc61d6a7ac48b42ebeae6745230
pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E6 4180 bytes