Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55a2430b7e25ee6…

MALICIOUS

PDF

35.6 KB Created: 2020-08-30 08:23:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f4a464621c1c683c5c0985f62191fc9 SHA-1: ab43f586703fe8076d0cbb18eb0e3cf3fd948877 SHA-256: e55a2430b7e25ee6c8d091662b92e80778c76ff4071aefb776cb56849bb7d527
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. This redirector, 'https://ttraff.ru/wix?keyword=breathe+again+sara+bareilles+piano+tutorial', is likely part of a phishing or malware distribution chain. The document body, though heavily obfuscated, also contains this URL, reinforcing its malicious intent. The presence of numerous other links suggests a link farm or SEO poisoning attempt to mask the malicious destination.

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=breathe+again+sara+bareilles+piano+tutorial
    • https://static.usrfiles.com/ugd/2e4eb4_8a111f4c31f14f3ea3e454a1084fbaaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_69ea20d14b0140ecba4d52c61cc1b7ac.pdf
    • https://static.usrfiles.com/ugd/868401_2693791048674277937547fb7952648e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ffe9087145e401890dc299fa14de368.pdf
    • https://static.usrfiles.com/ugd/8d0191_8fb5b2cd082240669c7d0c0138e75b0d.pdf
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/34380295056.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/pobazuwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/twin_bunk_bed_plans.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/96930565958.pdf
    • https://cdn.shopify.com/s/files/1/0433/7837/6867/files/python_mkdir_if_not_exists.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/class_11_cbse_biology_textbook.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_off00004d0e.bin
242676e860638f6be2c71be46110c0ef3e74cab67f336fb14bdc5cbbe1a22947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0E 5272 bytes
font_01_sfnt_off00005eed.bin
3f01d8b18c93da9983d597b115201eeb829d5e98a77c17c3ee8740e96f460b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EED 10096 bytes

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