Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea0c1414337cddc…

MALICIOUS

PDF

54.9 KB Created: 2020-08-22 16:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c7b5674968aa24f2e7053d685226348 SHA-1: 2b74f00df741b800a7761c6f749c277aa956ab98 SHA-256: 1ea0c1414337cddc8620ab6d4a2e02e71c0e92ba2c41ac44203d719a7e6228d6
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, disguised as a performance appraisal letter. This suggests a phishing attempt to lure the user to a malicious site. The PDF also contains a large number of external links, many pointing to Shopify domains, which is indicative of a link farm used to distribute malicious content.

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.com/pify?keyword=sample+letter+to+boss+for+performance+appraisal
    • http://nusilotef.riveraservices.org/uploads/1/3/1/4/131437774/eb94c20.pdf
    • https://cdn.shopify.com/s/files/1/0440/8557/5832/files/admiralty_digital_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0429/2168/9254/files/xilekezabem.pdf
    • https://cdn.shopify.com/s/files/1/0437/0841/6168/files/cara_main_game_emulator_ps2_di_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/87653056220.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30106301206.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/acrobat_star_show_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/7070/9142/files/56959851693.pdf
    • https://cdn.shopify.com/s/files/1/0433/0936/7454/files/gunajagi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2441/files/radio_shack_wireless_headphones_33-_280_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/tuwujifofububaxeniti.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_off00009a4d.bin
b1fc27528be4fd393953b2cc73d858c1b5a46613676612585860db40bed2e543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A4D 5404 bytes
font_01_sfnt_off0000ac8c.bin
1b0ae4c6f70e1883f85392cc9041aea11264d03096c1f4e762d0bdfe517f5c07		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8C 9964 bytes

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