Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52e49e06a030785…

MALICIOUS

PDF

48.3 KB Created: 2020-08-31 19:33:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b35593c21b679cd2629f42eb0c331516 SHA-1: 25b1d04fc43bef7702865766d0eda43618b590a9 SHA-256: a52e49e06a030785bcd351797db3729f628f113b3e74375ce21beac7c03eadd9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=3d+movies++free+full'. This URL is presented within the document body, suggesting a lure for users to click on it. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to obscure the malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.club/wix?keyword=3d+movies++free+full
    • https://cdn.shopi
    • https://static.usrfiles.com/ugd/b8c837_c33b2911070047f5bcef2f751b8f7695.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_e9b87050ed5a4b55b8c83fb7b5fa52ad.pdf
    • https://static.usrfiles.com/ugd/590778_8664351539494cd193e0babf09d9871b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a3aad227e63497298ce3abe0384383f.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/60011070567.pdf
    • https://cdn.shopify.com/s/files/1/0437/3259/8938/files/warframe_how_to_get_quill_standing.pdf
    • https://cdn.shopify.com/s/files/1/0435/4683/7151/files/satan_libro_ego.pdf
    • https://cdn.shopify.com/s/files/1/0434/9414/6200/files/6334155067.pdf
    • https://cdn.shopify.com/s/files/1/0434/4152/0805/files/vudotofiwopuminuliji.pdf
    • https://cdn.shopify.com/s/files/1/0469/4697/5905/files/12971184063.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/puxafunaretopaxufovisug.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/familia_cervidae.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8933/files/arikil_pathiye_ringtone_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/a_face_in_the_dark_full_story.pdf
    • https://cdn.shopify.com/s/files/1/0430/4492/9690/files/kefilirobabitizadoloduwal.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_off00007365.bin
67aaadec58b38882adb8ca8a365cbf512401e973ed3d30484c60e12c17f2aa77
pdf-font-stream PDF embedded font (sfnt) at offset 0x7365 4668 bytes
font_01_sfnt_off0000833c.bin
117e67c609102e5184d98c71d11fc876f0480bb8e5562a5806503dfb5677f38c
pdf-font-stream PDF embedded font (sfnt) at offset 0x833C 10212 bytes
font_02_sfnt_off0000a637.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA637 4324 bytes