Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e5a229ad471ec0…

MALICIOUS

PDF

39.6 KB Created: 2020-08-21 02:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83126c29f94b4509dd481d3e97578366 SHA-1: d6a6ed99603a0005838d1212cb80ac87a0f34935 SHA-256: 56e5a229ad471ec0f57758cf9efe81e488439400611c12383aff02891abea569
120 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, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files. The primary malicious URL, 'https://ttraff.ru/pify?keyword=hand+sewing+book+pdf', is designed to deceive users into believing they are downloading a sewing book, but it redirects to malicious infrastructure.

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.ru/pify?keyword=hand+sewing+book+pdf
    • http://wazuw.pacsyr.com/uploads/1/3/0/7/130776008/gadaki-gasinafupige-kiwigugorore-rinibobide.pdf
    • http://files.bremertonfoodline.org/uploads/1/3/0/7/130738956/fobaja.pdf
    • http://files.incredibottle.com/uploads/1/3/1/4/131483371/5866005.pdf
    • https://cdn.shopify.com/s/files/1/0439/1229/8648/files/xonokifikuworujujapipez.pdf
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/parasonowepuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/1653/5720/files/71148671985.pdf
    • https://cdn.shopify.com/s/files/1/0429/0491/2031/files/bugiwerim.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/tutorial_excel_2020_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/52716597818.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/don_t_let_s_start_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/30878226659.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_off00005cd6.bin
767a3a2350818f230ebfcb9db08809fcbae1a3a2cd42c68e7d73d3d660c065a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD6 5336 bytes
font_01_sfnt_off00006f22.bin
f630be7cc6d047072a3f348dab0c2b7c22a26dbe49abc6d59ab945545f9fe80b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F22 10348 bytes

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