Malicious PDF — malware analysis report

Static analysis result for SHA-256 e863d35839163b20…

MALICIOUS

PDF

54.0 KB Created: 2020-08-30 16:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 709a0c0fafbccc39c66448c43f72e1d4 SHA-1: 6b7da04e90338df394931d5a122a4832887b9e6c SHA-256: e863d35839163b203f6f8065d06fc5d5ac704dd4571ce1ff6dfa495e69826395
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 to obscure malicious destinations or to create a link farm for SEO poisoning. One of the primary links, 'https://ttraff.cc/wix?keyword=idol+room+47+sub+indo', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and references to other PDF files, reinforcing the link farm hypothesis. The file was generated using wkhtmltopdf, a tool sometimes abused for malicious purposes.

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.cc/wix?keyword=idol+room+47+sub+indo
    • https://static.usrfiles.com/ugd/8de238_4543a34efaa64b089e314432b1ec580b.pdf
    • https://static.usrfiles.com/ugd/9757e7_51bc50c66b5a4567a40a2efd1a316ef8.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_d63a89d268ae4cc69f17e9c24a22a9d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_048140dc2c5d46d5a66a8433c1475249.pdf
    • https://static.usrfiles.com/ugd/760101_e3802c650af445e49780591a6b4be838.pdf
    • https://cdn.shopify.com/s/files/1/0434/2769/2695/files/david_copperfield_questions_answers_chapter_1_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9019/files/a_play_tamil_movie_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/55504187920.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/muwuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0948/2658/files/durovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/analytical_and_numerical_methods_for_volterra_equations.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0136/files/95278691252.pdf
    • https://cdn.shopify.com/s/files/1/0464/9415/4904/files/biology_life_substances_notes_macromolecules_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/9094/2888/files/19278534332.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000aeec.bin
a1254582f89a2c6ae56fef8f6e6f7e9882d6ed91b230efe6cbec8e65b4f8076f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAEEC 17960 bytes
font_00_sfnt_off000065c4.bin
1b97a46a4f41ff92126f4874d18b8ca8e35dca78ed3c5f37334f37925c07ad78
pdf-font-stream PDF embedded font (sfnt) at offset 0x65C4 6336 bytes
font_01_sfnt_off00007afa.bin
8cd8d53635887ab10cc834aa56a89b414a74a6ce4e74126dd82166a094f9351d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFA 5008 bytes
font_02_sfnt_off00008bf2.bin
9000605011e84bea18bb106136b9c78f348f256262891a1aad03c8206054cb80
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF2 10164 bytes