Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a55b5aa7e97c7e…

MALICIOUS

PDF

40.3 KB Created: 2020-08-30 09:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55fad5cbc72eb9b4123b50f8feceea82 SHA-1: 968a5e0a692f259c869995032162d1cabffe30b2 SHA-256: a5a55b5aa7e97c7e89f5db6340846525e3ed46ff428a2b4070bc683e7411bc74
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used in SEO poisoning or link farm attacks. One of the primary links, 'https://ttraff.link/wix?keyword=casio+gw+m5610+manual+pdf', points to known malicious redirector infrastructure. The document body appears to be heavily obfuscated or corrupted, but the presence of URLs and the heuristic firings strongly suggest a malicious intent to redirect users to harmful 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.link/wix?keyword=casio+gw+m5610+manual+pdf
    • https://static.usrfiles.com/ugd/ed64d2_4ddac50b034841ebbf3d722dff9493ca.pdf
    • https://static.usrfiles.com/ugd/77eba6_81a903769ccb4952843b15f77d8c995d.pdf
    • https://static.usrfiles.com/ugd/49be48_18e84049f2a54c269006e4d644e61890.pdf
    • https://static.usrfiles.com/ugd/07625c_1ba818ecd7cd4ec9bf2ba336b3f53820.pdf
    • https://cdn.shopify.com/s/files/1/0438/6209/8085/files/sandy_hook_fishing_reports.pdf
    • https://cdn.shopify.com/s/files/1/0435/0840/0280/files/rigoxokonawederakekezu.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/xekabu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9946/4611/files/porijadifebonijolud.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/pc_me_file_kaise_banaye.pdf
    • https://cdn.shopify.com/s/files/1/0435/7373/9675/files/3797354234.pdf
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/nirasuje.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1269/files/duck_dynasty_full_episodes.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_off00005e8e.bin
6823989b9584d3f9b7a76ab6f7d420bf8a6c74ecd10b5dbf2809da7f0ebb2f37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8E 5736 bytes
font_01_sfnt_off0000721d.bin
ba7697738e56919420ec3f12276c7023e254e8bf54d945863204a35106a44885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721D 10140 bytes

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