Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40a63fbb43c6436…

MALICIOUS

PDF

37.6 KB Created: 2020-08-14 14:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8861948af5fbdac3ff041a62c5fad1aa SHA-1: af0bd8fd5eb0ffdce3bf74771aa20c55ce66462d SHA-256: d40a63fbb43c6436474c8e61c778597b4fed3d62431da620a22627f78cd220ca
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector, specifically 'https://ttraff.ru/pify?keyword=bluetooth+driver++intel', which is presented as a lure for a 'Bluetooth driver'. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links hosted on Shopify. The primary attack vector appears to be directing users to malicious infrastructure via these links.

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=bluetooth+driver++intel
    • http://files.melbphotography.ca/uploads/1/3/0/7/130776063/rarozatorotipo.pdf
    • http://files.acssdownload.com/uploads/1/3/0/7/130739308/bakinike.pdf
    • http://files.susanbrumfieldmusic.com/uploads/1/3/1/4/131482958/zemegobimisog.pdf
    • http://files.chanble.com/uploads/1/3/1/4/131453024/lasirum-fojidoderek-dejijifupisig-wavuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/dmv_ny_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/i_spit_on_your_grave_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0437/1631/3242/files/xenenumamelebovewewatesax.pdf
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/40969835583.pdf
    • https://cdn.shopify.com/s/files/1/0434/6416/3490/files/elegy_in_d_bottesini.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rirolor.pdf
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/jozubitaxijiwilegududixiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7929/4358/files/84405392292.pdf
    • https://cdn.shopify.com/s/files/1/0431/5011/4978/files/93537021512.pdf
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/90449968706.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40948382406.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/aflatoksin_nedir.pdf
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/83572678973.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_off00004fde.bin
fce4cfef0226e78691c3bcd38f9923a94c5ac5cb3844687f573e8abc5a149ab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDE 4632 bytes
font_01_sfnt_off00005f9c.bin
05a6001a241cbfbc7483cc20e9eed0052c8aaeb5230ed6e7ca83f69ae7407158
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9C 13036 bytes