Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5122d116936e019…

MALICIOUS

PDF

38.6 KB Created: 2020-08-31 12:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16cc5e9145e76621803195d06aec4eea SHA-1: 3a7cde3ba69d31ccdf8fcc3143463fe719c51562 SHA-256: f5122d116936e019601f1243081b72d13eabcbeb9dd2f554f361a69d07ca9ede
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is likely used to lure users to malicious websites, disguised as a search result for '7 mortal sins anime uncut'. The document also contains a large number of embedded links, many pointing to 'static.usrfiles.com', which is flagged as a link farm. The ML classifier also strongly indicated maliciousness.

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.cc/wix?keyword=7+mortal+sins+anime+uncut
    • https://static.usrfiles.com/ugd/b8c837_a27ceee5ee714d4b8ebded0024d36048.pdf
    • https://static.usrfiles.com/ugd/b8c837_70bdf55477a54863a2aab8f1195cbc7b.pdf
    • https://static.usrfiles.com/ugd/cac9e4_6f559197df424ad6b1478e3e0dd9c02d.pdf
    • https://static.usrfiles.com/ugd/b8c837_e5acf02223be4a95828d47b5ada9c786.pdf
    • https://static.usrfiles.com/ugd/b8c837_e79c0f4815e3483199cd39ad8e361528.pdf
    • https://static.usrfiles.com/ugd/ab922d_c5190d1714a446f5a4911c3ca69d0735.pdf
    • https://static.usrfiles.com/ugd/6f58fb_74a2d7a98b3842afbafff88c4aa888a8.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_ce140013a7914df0b80ea3abf7824e1c.pdf
    • https://static.usrfiles.com/ugd/b42fd6_9eed43253230490b9bf4e5e6b99f5a39.pdf
    • https://cdn.shopify.com/s/files/1/0437/0091/2282/files/vitotronic_200_notice_dutilisation.pdf
    • https://cdn.shopify.com/s/files/1/0459/7687/9271/files/wejatebelosaguputuxekabik.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9263/files/files_minecraftforge._net_1._8._1.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/jegerig.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7462/files/14702556261.pdf
    • https://cdn.shopify.com/s/files/1/0428/9950/5311/files/9825045092.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_off000050e3.bin
92380572030281d734caaa64c9993168bf3e22ff9d3b9776412de12d1bc5dc24
pdf-font-stream PDF embedded font (sfnt) at offset 0x50E3 4932 bytes
font_01_sfnt_off0000618c.bin
40e1023aabfba25d64ac72ce320dd94262db904a1ec24349e90ed3ef23f5f005
pdf-font-stream PDF embedded font (sfnt) at offset 0x618C 13980 bytes