Malicious PDF — malware analysis report

Static analysis result for SHA-256 a066f40673e0c667…

MALICIOUS

PDF

39.8 KB Created: 2020-09-01 10:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54caa70d79fc781f66197c06c545c029 SHA-1: 32c11a928be60855a996a298242b34ad2395e083 SHA-256: a066f40673e0c667c45b3f9e593cc6e6d41437f11eb84d819bb2283fa30c6e07
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, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.cc/wix?keyword=android+17+18, is flagged as a malicious redirector. The document body contains garbled text but also includes the suspicious URL, suggesting a lure or redirection mechanism. No scripts were extracted, but the sheer volume of links points towards a content manipulation or redirection attack.

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/wix?keyword=android+17+18
    • https://cdn.shopify.com/s/files/1/0432/7587/8564/files/88822797164.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/wutegazajuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61066914906.pdf
    • https://cdn.shopify.com/s/files/1/0463/1763/3698/files/labegafodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/mafogujebubijolenu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7566/6073/files/piano_sheet_music_for_kids.pdf
    • https://cdn.shopify.com/s/files/1/0429/2883/2675/files/enuresis_nokturnal_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2394/files/wirigoju.pdf
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/office_open_xml_document._docx_to_online.pdf
    • https://cdn.shopify.com/s/files/1/0430/5528/4378/files/fezokujukajulosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/bhagavad_gita_para_todos_jack_hawley.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_off00005edc.bin
0cfeb53936bc10d885e86815271073f7b545dbcbe87e72b97479fe15efa7b343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDC 4712 bytes
font_01_sfnt_off00006efd.bin
de7ac204247aa07c5572a41f4be7b2bb3b7fc37f99a12a61670c056dfb154945		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFD 10536 bytes

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