Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf253e32c1f214b…

MALICIOUS

PDF

40.1 KB Created: 2020-08-14 09:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bdbcf230697fbd55dc7756e9e0b7f29 SHA-1: 62bed4eaac410b7b6fe71a110ffeb929870d2414 SHA-256: fbf253e32c1f214b59e6d6cbff1f755d1a50e9e2f8ea02129af10eefa6fde593
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious redirector URL and a benign-looking title 'Coerver soccer drills pdf', suggesting a lure. The presence of a visual download button heuristic further supports the social engineering aspect of this attack. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=coerver%20soccer%20drills%20pdf
    • http://files.adajunmakeup.com/uploads/1/3/1/8/131856852/wopevigegejapal.pdf
    • http://files.triadchialpha.org/uploads/1/3/0/9/130969434/8247819.pdf
    • http://files.ursulagoebelsellis.com/uploads/1/3/2/7/132741429/zepop.pdf
    • http://mateviw.goodheartedgang.com/uploads/1/3/2/6/132695829/kekixu.pdf
    • http://files.orienteeringalberta.ca/uploads/1/3/2/7/132712099/9674847.pdf
    • https://cdn.shopify.com/s/files/1/0440/2616/7461/files/12446567406.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/wild_life_ring_tones.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/31026798607.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/30798864322.pdf
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/73680803022.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/computer_abbreviations.pdf
    • https://cdn.shopify.com/s/files/1/0430/3755/6899/files/92635319068.pdf
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/noxosinagotiguwur.pdf
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/bafobekipipaxas.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/vakexevanufanevuduzadiv.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/23206427536.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_off00005f3e.bin
6be7fb152ee1b6dfcfd7436f29b0554206460941563f9cb72143bcb73c08de6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3E 4904 bytes
font_01_sfnt_off00007003.bin
2cd60ff53a3ce47f276cfb0bb04638ee0e66da3f6d6d41bc74797adbffd434a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7003 10408 bytes