Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d1cd56e6713c09…

MALICIOUS

PDF

53.6 KB Created: 2020-08-03 07:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ebb04f3b4411e5faa86719e920da741 SHA-1: 1ca2f8da06d4fe5a1c838ac7011f9c33bd12981f SHA-256: 34d1cd56e6713c09a584d574799c905a967af25b92b51400c45e58c65e3604b3
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.com/wb?keyword=how%20to%20learn%20korean%20language%20in%20english%20pdf, which is likely used to redirect users to a harmful destination. The document body, though heavily obfuscated, also contains this URL, suggesting it's part of the lure. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination.

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.com/wb?keyword=how%20to%20learn%20korean%20language%20in%20english%20pdf
    • http://bukak.besedin.org/uploads/1/3/1/3/131398091/fe7d15989aa494.pdf
    • http://files.maxiandolikessler.com/uploads/1/3/2/6/132683289/9094524.pdf
    • http://files.singlewomanjoan.com/uploads/1/3/1/4/131406498/7119854.pdf
    • http://files.germanscalzo.com/uploads/1/3/2/6/132681456/5564080.pdf
    • http://files.thefeatherednestdowntownwestjefferson.com/uploads/1/3/1/8/131871786/139f61634f6868.pdf
    • https://cdn.shopify.com/s/files/1/0431/3979/3050/files/makenoxobelune.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/98953380883.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/57949292922.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/92319076452.pdf
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/givoxobigonane.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.pdf
    • https://cdn.shopify.com/s/files/1/0428/5592/3878/files/factorio_3_to_3_balancer.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/44279365290.pdf
    • https://cdn.shopify.com/s/files/1/0438/9876/5480/files/15047429082.pdf
    • https://cdn.shopify.com/s/files/1/0435/3445/0840/files/nuxeliwoxur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/vijavalin.pdf
    • https://cdn.shopify.com/s/files/1/0434/5951/0425/files/97887798424.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_off0000934a.bin
77664a0b1ac79403ce6e8c1adee5ec3623e3aa0ddc8fa1e3d08db0a18a243fd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x934A 5420 bytes
font_01_sfnt_off0000a5c6.bin
a28f0a1e8fc39b7b755797fd435927eacf9474b11d588de3750f83f7b94e9c4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C6 10384 bytes