Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5b1137036345097…

MALICIOUS

PDF

51.8 KB Created: 2020-08-30 06:19:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8849d1462dc40f07ee7b087ab8b92ff2 SHA-1: 9afa818d8252a0105694360175ebec16b4b6e406 SHA-256: a5b113703634509788c11a01a3df5db460c9a06f7568e9df35f63ec41628331e
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=deccan+chargers+new+jersey'. This link is presented within the document body, suggesting a social engineering lure. The file also contains a large number of embedded links to Shopify domains, indicating a potential link farm for SEO poisoning or to obscure the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.

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.link/wix?keyword=deccan+chargers+new+jersey
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/us_2015_holidays.pdf
    • https://cdn.shopify.com/s/files/1/0435/4146/3189/files/kemipubutuvovupudowoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/sectional_orthographic_projection.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/chemistry_notes_for_class_11_cbse_download.pdf
    • https://cdn.shopify.com/s/files/1/0462/7372/4576/files/kitchen_planning_guide_ikea.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/71069823978.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4907/files/bufalonegedolujedawaviwo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/toxawezuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/takokeduzelisimavizaxizap.pdf
    • https://cdn.shopify.com/s/files/1/0430/6268/9946/files/41447392040.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/google_spreadsheet_macro_excel.pdf
    • https://cdn.shopify.com/s/files/1/0435/5447/2087/files/28187093904.pdf
    • https://cdn.shopify.com/s/files/1/0430/3241/2311/files/books_on_subconscious_mind.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/novizam.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_off000080ec.bin
118f46adc2b59f8652efce48b7f93818d5337398f3b8cb32b8a4966ac03dff56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80EC 5296 bytes
font_01_sfnt_off00009308.bin
ee62028d2bdc7adf6f5a21ed513ac51cbabeccbc30c9318e1c30d9aeb55702fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9308 15488 bytes

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