Malicious PDF — malware analysis report

Static analysis result for SHA-256 5242b5b9f082bfc3…

MALICIOUS

PDF

51.0 KB Created: 2020-08-16 00:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64082e96c83a44ab4843083774f9d3b8 SHA-1: d10fb821e58ac5a6184911484467eaa3bd643573 SHA-256: 5242b5b9f082bfc30c576dd95fd41f60b876d59f85159364799a04250b291c3f
120 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, pointing to 'https://ttraff.ru/pify?keyword=achieve+ielts+practice+test+book+pdf'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The PDF also contains a link farm heuristic, indicating it's part of a larger SEO manipulation effort. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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/pify?keyword=achieve+ielts+practice+test+book+pdf
    • http://xuveta.spearwooduniting.org/uploads/1/3/1/4/131437044/gidunovir_fobeturenolana.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/41856102553.pdf
    • https://cdn.shopify.com/s/files/1/0440/2325/1094/files/zoxaribipusijabuwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/58760255638.pdf
    • https://cdn.shopify.com/s/files/1/0431/2432/6564/files/personal_finance_kapoor_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/assets_and_liabilities_format_in_kannada.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/lofudomekub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12729031526.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wirokole.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/23759983728.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/mopitomuburerabepol.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/parisibudipaxetiwori.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
stream_005_off000095e7.bin
4504f816084b3eb652d1aac2caa25548956532dc060831dbf57c25d5e60410bc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x95E7 23704 bytes
font_00_sfnt_off00005ef7.bin
89a238190663108fede697c5bcdd3a0103206c3f914ee60f632c31e01c41760f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF7 5496 bytes
font_01_sfnt_off00007198.bin
210dbc04b151d30b26cbdd3c6cf70f01e675fc1abc5cdca85403a0c618ec605b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 11352 bytes

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