Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a166cc292686f05…

MALICIOUS

PDF

41.8 KB Created: 2020-08-18 13:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04c22ca051ad3231b085887fbb2768c9 SHA-1: 75479c2935217b686049b1dc14aab38c0b35f313 SHA-256: 1a166cc292686f0586d5cf0510f2aab06b0cdb0938f18ac6a5352969c14ae346
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it features a large number of embedded links, many hosted on Shopify, suggesting a link farm for SEO manipulation or distribution. The document body, though heavily obfuscated, contains the text '4k video er site' and the malicious URL, indicating a lure to a potentially harmful site.

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.ru/pify?keyword=4k+video+er+site
    • http://files.drsa-web.com/uploads/1/3/1/4/131410747/120b8ae9147fa7.pdf
    • http://xepore.byboukje.nl/uploads/1/3/1/4/131406390/1427479.pdf
    • http://files.simplyyogacenter.org/uploads/1/3/1/8/131856046/nilubamakipepamage.pdf
    • http://files.outonalimbdance.com/uploads/1/3/0/7/130775679/bomovoxugolil.pdf
    • http://files.dr-yakirov.com/uploads/1/3/2/7/132711983/fijazegeriduzos-bexotudijufupu-terivoj-sinoro.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/mexubegerixafizutasofura.pdf
    • https://cdn.shopify.com/s/files/1/0454/6196/2910/files/24827855102.pdf
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/electronics_instrumentation_lab_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/1503/5288/files/4175768174.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/estudio_sobre_el_bautismo_cristiano.pdf
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/22672318215.pdf
    • https://cdn.shopify.com/s/files/1/0437/8578/1405/files/2760403052.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/87020207685.pdf
    • https://cdn.shopify.com/s/files/1/0434/6193/5261/files/44497892133.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/statistical_methods_by_s._p._gupta_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/32225204936.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/risuwaxovo.pdf
    • https://cdn.shopify.com/s/files/1/0441/4255/9384/files/69072719789.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_off00004f45.bin
55f2a905493e907d4e77114350fa82490d840768baccdb2b72e66563e5f8c59c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F45 5588 bytes
font_01_sfnt_off000062cb.bin
bcb1304996b9d462047b0b2eeb50c517adb6bfa27e1929ae5820b0de1581678b
pdf-font-stream PDF embedded font (sfnt) at offset 0x62CB 4692 bytes
font_02_sfnt_off000072d6.bin
952a9097899f733ee3c041e378b18f35b081476c632caaabc93a3fac5fe6ebb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x72D6 12044 bytes