Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2e2e797da6a541…

MALICIOUS

PDF

51.1 KB Created: 2020-08-29 08:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 590d03a4c8bec0c643f09921bc6efc43 SHA-1: bd49572afabb3064172f175ba0ee75e3ebc96f99 SHA-256: 4a2e2e797da6a541a6e040061aa8e49ca2786b3e330fd9d12db3432a0a37c6b0
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body text is heavily obfuscated but contains the URL 'https://ttraff.ru/wix?keyword=bevel+gear+terminology+pdf', which is also listed as a malicious redirector. The presence of numerous links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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.ru/wix?keyword=bevel+gear+terminology+pdf
    • https://static.usrfiles.com/ugd/b8c837_1c52407394504aaeba3a17284267aed0.pdf
    • https://static.usrfiles.com/ugd/b8c837_29ffe30b108647d0a3a8c20d0ba16e14.pdf
    • https://static.usrfiles.com/ugd/b8c837_604205606b5744b7bbbff45f4fcc0137.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ee0e4978d2f4d1aa929704d3dc48fbb.pdf
    • https://static.usrfiles.com/ugd/b8c837_f866999989704b5396005953c64bedf6.pdf
    • https://static.usrfiles.com/ugd/b8c837_bde198de5d0b4ac3926ff7a233862e2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0c0ceca269946ed84108e499f627310.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6716/files/tinufavapajamojafef.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/cma_cgm_group_financial_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/6776/8981/files/mulisasapesi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/piriletinexatadorekuguf.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/48729050278.pdf
    • https://cdn.shopify.com/s/files/1/0433/4678/8501/files/nujugonulevupogibijufu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8309/4434/files/71230947282.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/ranudixezodi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c81.bin
402e5ad32cda56b05e605920aad93ba2375fea32054a8150efdd32515f225979		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C81 5184 bytes
font_01_sfnt_off00008e15.bin
cbb3278fd363a26e590c136d8a8b04f1544a74b85c191d485c6d9cfe4bdf252d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E15 10388 bytes
font_02_sfnt_off0000b18a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB18A 4324 bytes

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