Malicious PDF — malware analysis report

Static analysis result for SHA-256 a118da011b357fe3…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 18:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 475490fe9f94ef2a7c13b1c73a41c42e SHA-1: cc0a5a369ea510c4009b00bedb2163cb39b9e75a SHA-256: a118da011b357fe3cbc67f1cb83ef398e9a4541c7381a42c9057eb8c41ce6d60
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to the presence of a large number of embedded links, including one pointing to a known malicious redirector. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's a lure document. The primary malicious activity observed is the mass distribution of external links, likely to facilitate phishing or malware delivery.

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/wb?keyword=tbc%20pada%20anak%20pdf
    • http://files.scimedart.com/uploads/1/3/2/7/132712623/revibuziv.pdf
    • http://files.earthrenaissancetechnologies.com/uploads/1/3/1/4/131406606/5167917.pdf
    • http://files.thecityofrefugenj.org/uploads/1/3/1/4/131454373/749087.pdf
    • http://files.talesbyataillesscat.com/uploads/1/3/0/7/130775503/sezupasobogofixeruv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2314/5896/files/doruvaxipawegojumuxaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6961/files/zifolew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0441/1555/8552/files/cantaloupe_island_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/vupimufefoved.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/43569901525.pdf
    • https://cdn.shopify.com/s/files/1/0434/6413/0725/files/secure_contact_form_php.pdf
    • https://cdn.shopify.com/s/files/1/0435/8383/2227/files/dynex_tv_remote.pdf
    • https://cdn.shopify.com/s/files/1/0438/7949/7896/files/84831947336.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/kanulofibijipurelikuso.pdf
    • https://cdn.shopify.com/s/files/1/0429/7385/5903/files/gixudikisifasisox.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/resto_druid_icy_veins.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/73031994391.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_off000063e4.bin
447441a3eb60f35511a73f641da63abbfb815188c85fe850845e54c28fe70f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E4 4996 bytes
font_01_sfnt_off000074fa.bin
66d12533ee9c44e5b3b2c645ac1ea6a191e5750b65e7362c487450b113343192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FA 9872 bytes

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