Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3b9c06345f534fc…

MALICIOUS

PDF

39.5 KB Created: 2020-08-02 11:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59657ef0c9574038c1e7fd9cdd6fb813 SHA-1: a5902d2b56283cb573783e61d443c816c3dfc7d0 SHA-256: f3b9c06345f534fc6e0d95ae018877840994d12b3c7ac60226e582151105b301
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to 'Brother hl- 2270dw drivers' and the malicious URL. This suggests a social engineering lure to trick users into downloading potentially malicious files disguised as drivers. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, with the primary malicious link being the most concerning.

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.cc/pify?keyword=brother+hl-+2270dw+drivers
    • http://files.riponcitybonfire.org/uploads/1/3/1/3/131380354/karuwif_puxubovu.pdf
    • http://files.downtowndogs.ca/uploads/1/3/1/0/131070842/puvet.pdf
    • http://files.shelleygentry.com/uploads/1/3/0/7/130776131/79f938f.pdf
    • https://cdn.shopify.com/s/files/1/0432/8777/3342/files/vuposabisisexilanapuxitam.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1329/files/monster_hunter_lagombi_armor.pdf
    • https://cdn.shopify.com/s/files/1/0429/9581/0455/files/25289594281.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/sozinuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/webepetarofatikanagip.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0437/8319/2727/files/fowoxewosemewimipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/nerexuwib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0434/6000/1954/files/15969271539.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/zotaputasixaro.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_off00005bac.bin
7123fa1b9a944b127a77997c03bc53695ad147f5be7cc0a212fc87a8aab88e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BAC 5288 bytes
font_01_sfnt_off00006dc9.bin
641254611bf6c39dfb654c1aaf24b6c17788e6b62055c18affc00e700ea8c264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC9 10576 bytes

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