Malicious PDF — malware analysis report

Static analysis result for SHA-256 55877638738ecef5…

MALICIOUS

PDF

47.0 KB Created: 2020-08-31 07:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dce0d71990d4ec42cd20615d0862ac4 SHA-1: 8e6c9d56b2ca97e181f4158f75d0e71e2599a219 SHA-256: 55877638738ecef5f3113bb4d1f6e40edd351f8dd51bf1902a6dd33a5dec7363
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, indicating a link farm. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. While no scripts were extracted, the structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/wix?keyword=%25C3%25B6l%25C3%25A7%25C3%25BCs%25C3%25BC+180+derece+olan+a%25C3%25A7%25C4%25B1
    • https://cdn.shopify.com/s/files/1/0435/5771/6127/files/android_x86_change_screen_resolution_virtualbox.pdf
    • https://cdn.shopify.com/s/files/1/0462/7952/4512/files/96292352264.pdf
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/android_vs_ios_market_share_global.pdf
    • https://cdn.shopify.com/s/files/1/0433/6825/1543/files/tefox.pdf
    • https://cdn.shopify.com/s/files/1/0464/7957/3160/files/simple_html_css_template_for_website.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/89318854674.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/kosav.pdf
    • https://cdn.shopify.com/s/files/1/0433/9115/6380/files/bivetogobegaxawarik.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/blockchain_for_dummies_ibm.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/emglo_air_compressor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/31173954479.pdf
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/54412160615.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/soxuxikifetojoredufap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2240/files/jibajokuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/sigoti.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/27875264973.pdf
    • https://cdn.shopify.com/s/files/1/0431/7750/9020/files/typography_artwork_template.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_off0000686b.bin
9dbf6d97a18a5e270fff8f5202dad9cf323dbd79a31cd7a8f905b3f986005fcf
pdf-font-stream PDF embedded font (sfnt) at offset 0x686B 5372 bytes
font_01_sfnt_off00007a60.bin
c1d60d4ac48a7867e8bafd7a35e9f9f4debeb4003f11134e2e4d65b57a8e8a19
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A60 11696 bytes
font_02_sfnt_off00009f1d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F1D 4324 bytes