Malicious PDF — malware analysis report

Static analysis result for SHA-256 e428dec009c60ba1…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 09:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca0b8f83cb3322d9cd2fe1b8eed4b9a6 SHA-1: eeb2bc0f5038f74108e82a97621ac2403f9425a3 SHA-256: e428dec009c60ba1155ac8124551d06043923cf188538ce856e9bdf5d805c2d7
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it contains a large number of embedded links, identified as a PDF link farm, likely for SEO manipulation. The primary malicious URL identified is https://ttraff.me/wix?keyword=gymnastics+boise+idaho. The document body appears to be corrupted or heavily obfuscated, but the presence of URLs and the heuristic firings strongly suggest a malicious intent focused on redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=gymnastics+boise+idaho
    • https://cdn.shopify.com/s/files/1/0431/7629/6605/files/birthday_picture_frame_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/7530/3592/files/alter_ego_5_cahier.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3095/files/76704934255.pdf
    • https://cdn.shopify.com/s/files/1/0448/5795/0370/files/beyond_training_download.pdf
    • https://static.usrfiles.com/ugd/cac9e4_3051f5393f1544c38e3e1b96090689d9.pdf
    • https://static.usrfiles.com/ugd/2ac701_6036ce9b20f24bf9b42d7ca441a7806e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec1581671e9f4cbabdd2bf6ea3278440.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e41bf04d25d40b1af3d2ff4f7f16f33.pdf
    • https://cdn.shopify.com/s/files/1/0464/4903/3384/files/hollow_knight_progression_route.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/bhaagamathie_tamil_full_movie_hd_tamilrockers.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/astera_fest_daily_bonus_compensation.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_off00006990.bin
dac3407281bd3a17000b293976085b4ea77332759e10aaf7596fd3b5dc994ced
pdf-font-stream PDF embedded font (sfnt) at offset 0x6990 5324 bytes
font_01_sfnt_off00007b7c.bin
68cf662c3df13b754214a3f60301bb5d6b1e98b261b51e323f53dd0a68875c9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 10480 bytes