Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd97766cbd5c8a4…

MALICIOUS

PDF

34.1 KB Created: 2020-08-14 18:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a2eb99cff4ce7abb19a95c890353134 SHA-1: 399aefdbf8dd37026ae22f0f0d05e289e2e57779 SHA-256: 4dd97766cbd5c8a4004ba31cb2c95c41b3db7812a551a94c70c001ee539462a7
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=usg+boral+plasterboard+installation+manual', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to installation manuals, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to malicious infrastructure through a deceptive link.

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=usg+boral+plasterboard+installation+manual
    • http://files.jacksonheightsofwb.com/uploads/1/3/2/6/132682919/keganudavupazefidosu.pdf
    • http://files.rileymeadowsstable.com/uploads/1/3/0/7/130775740/gititog-jijugojut-daragi-kajivu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/pezuropuvivatomujikolaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/linux_mint_wifi_driver.pdf
    • https://cdn.shopify.com/s/files/1/0434/1281/6034/files/ridumepisuzerujojoveseda.pdf
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/48743871063.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/zekufananuzenetox.pdf
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/109379412.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/elder_scrolls_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/wivuxufanokimijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pujofupokutesigitugut.pdf
    • https://cdn.shopify.com/s/files/1/0432/7289/6672/files/71315926216.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_off00004749.bin
60e5d74e1fefe82a5e82249a46fd5a90853add9abb712a9e61c366730d0cf4f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4749 5408 bytes
font_01_sfnt_off0000598a.bin
3f86eae8116b1b5ba0044c83ec729dda688bcf5a79c7d6bc889b5eca33512f3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x598A 9936 bytes

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