Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c6f498f0668bc8…

MALICIOUS

PDF

45.0 KB Created: 2020-08-19 23:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3df3fba5ce827ca696140d47daa74394 SHA-1: fa0b573e0f86dc664f4539321b80d09b0715d3e4 SHA-256: f1c6f498f0668bc85515be868ebda724429f10f3d9b1ef3a2f5db1488f01963c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=caverna+do+drag%25C3%25A3o+final+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on cdn.shopify.com. The document body, though heavily garbled, also contains the same malicious URL. The combination of these factors strongly suggests the PDF's primary purpose is to lure users 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=caverna+do+drag%25C3%25A3o+final+pdf
    • http://files.jacquelinedeangelis.com/uploads/1/3/0/8/130814596/depupivaxidif.pdf
    • http://files.smallorch.com/uploads/1/3/1/1/131164324/0f90971de51.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8286/files/niwak.pdf
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/7_wonders_of_the_world_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/jurnal_fermentasi_ampas_tahu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7157/6993/files/wuloxut.pdf
    • https://cdn.shopify.com/s/files/1/0437/5219/4202/files/4._4_biomes_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1318/files/possessive_adjectives_long_form_in_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/analgesia_y_anestesia_obstetrica.pdf
    • https://cdn.shopify.com/s/files/1/0429/5039/4019/files/pitinasibujeti.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_off00006f9b.bin
ed13359a583adf69dd3f47519e309ccb8ac54e5e3fd661e0c86aaf3bad3c1f40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9B 5316 bytes
font_01_sfnt_off00008138.bin
b85ed92a37b54dc26513e567f096bd1b366e7ec7ed2a2ee788412416467bc2e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8138 12292 bytes

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