Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c6716dbea03e8f…

MALICIOUS

PDF

49.8 KB Created: 2020-08-29 23:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f76cb1e3adf285e865e894865e1d3dc5 SHA-1: 313ff7eb9e08886d41f27c902d99300b1cc835ee SHA-256: f2c6716dbea03e8f5a0f094c0a13bd1d4ebf45d1079d42cf795914c615de4bbf
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to a malicious URL under the guise of providing a PDF document, likely for phishing or malware delivery.

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.com/wix?keyword=warframe+meta+weapons
    • https://cdn.shopify.com/s/files/1/0439/0384/4520/files/anyconnect_client_ordering_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0435/8687/9647/files/248740889.pdf
    • https://cdn.shopify.com/s/files/1/0439/8333/9678/files/absolute_pressure_and_gauge_pressure.pdf
    • https://cdn.shopify.com/s/files/1/0429/9158/3391/files/28403328868.pdf
    • https://cdn.shopify.com/s/files/1/0431/5634/0890/files/dekomozumozujiwujadafal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3258/4098/files/savatejonuwerox.pdf
    • https://cdn.shopify.com/s/files/1/0435/5194/8963/files/ace_academy_books_for_civil_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/chameleon_3d_live_wallpaper_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5543/2348/files/nanofubugajalaxetinefop.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a9d8c3bd2f34959b9573af6e6a70b68.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c3396a730224ef3be5a2a9c5f2265b8.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5ccd4701b2d4f4f9a250e922d0e93c1.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4399/files/aiims_assertion_reason_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/where_to_put_autoexec_cs_go.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0330/files/legubodumekug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ebb.bin
d56bf6f4ea0f8a92915b0c535cc7bcd82947898a614e841a5462b3d1932e94d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBB 5120 bytes
font_01_sfnt_off00008026.bin
0a129a784be7eb76dcea9ab8597f9767396fb0e2c666ce0066abe6d57d9fea85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8026 10700 bytes
font_02_sfnt_off0000a473.bin
4189bb5d82d37c3b06c761c00ca3b3c8a7a7312639514cd6a20481e76712d457		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA473 16388 bytes

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