Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb55746e4c1b2d9…

MALICIOUS

PDF

49.7 KB Created: 2020-08-18 16:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f007eeeda327ff29ada7a7641afba83 SHA-1: 6473fb826d4bae71723b967188e35b47417b6cca SHA-256: ffb55746e4c1b2d9bff18e6427c848d067658595846041e7a9ccabc0b5e1aaf8
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=21+sheet+street+surgery+windsor'. The document body, though partially corrupted, contains text related to '21 sheet street surgery windsor' and the malicious URL, suggesting a lure. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=21+sheet+street+surgery+windsor
    • http://files.samanthadetillio.com/uploads/1/3/1/4/131453453/8240969.pdf
    • http://files.truenorthmaintenance.com/uploads/1/3/2/6/132682615/wuniba.pdf
    • http://files.diamondpaintingconnection.com/uploads/1/3/1/6/131637016/54469954250056.pdf
    • http://files.fortmyerthriftshop.org/uploads/1/3/1/1/131164112/dapali-tidotalemixid.pdf
    • http://files.cc4cl.org/uploads/1/3/0/7/130775980/ef2002851.pdf
    • https://cdn.shopify.com/s/files/1/0438/6612/8549/files/35085086627.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/kezunutovepisekofaxapave.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/baxituxuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/appel_d_offre_informatique_quebec.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/hallelujah_lyrics_kate_voegle.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/rofebafow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xuvekalododit.pdf
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/59344302198.pdf
    • https://cdn.shopify.com/s/files/1/0427/6014/3014/files/cad_block_free_flowers.pdf
    • https://cdn.shopify.com/s/files/1/0430/4843/5861/files/zoxozegejusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/44419728961.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006267.bin
2e108187953630a5e29e69b61d7caad4a267b6cec695e97dc3af57c085b063db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6267 5008 bytes
font_01_sfnt_off00007381.bin
e1a520af876cdff488cf308baeabb227468ce23712632c4fa302f7440a16b894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7381 10140 bytes
font_02_sfnt_off00009664.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9664 16092 bytes
font_03_sfnt_off0000ab2c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB2C 4324 bytes

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