Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e21bd2d410b7e5d…

MALICIOUS

PDF

53.6 KB Created: 2020-09-01 12:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 957492eb39fe059644600e79dfa9c968 SHA-1: dc70f70751f1189c88ece1ff185f53bca6bb25ca SHA-256: 9e21bd2d410b7e5d6b0c2103c7295c7dcebb901835f26aa8993a061f2e696d8f
128 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as an application form. The document also includes a large number of links to external PDFs, likely for SEO manipulation or to obscure the malicious redirector. The presence of a visual download button further supports a social engineering lure. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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.cc/wix?keyword=amu+class+11+application+form+2019-+20
    • https://static.usrfiles.com/ugd/87fdc7_4d2c00502cbc42d2b27306080924b41a.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a5744a1b30e48a28ca4e771fb670019.pdf
    • https://static.usrfiles.com/ugd/efb3f0_f0c7608de3f44daf8f27c39c79d6353d.pdf
    • https://static.usrfiles.com/ugd/c345b0_02a80802615746ad9b397f64a9bd814c.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_4a0a9fd7001f447c97f1f6eebf4a56ea.pdf
    • https://static.usrfiles.com/ugd/fb83f1_32eeb86ccbad49e79645f6533879e474.pdf
    • https://cdn.shopify.com/s/files/1/0435/2969/9482/files/62053520101.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/vocabulaire_anglais_financier.pdf
    • https://cdn.shopify.com/s/files/1/0430/7854/9665/files/68485522432.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0440/1656/6422/files/rabavuveretexes.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/79044587379.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/14993876953.pdf
    • https://cdn.shopify.com/s/files/1/0461/9993/1030/files/block_style_letter_format_in_word.pdf
    • https://cdn.shopify.com/s/files/1/0431/5788/0996/files/bhakti_bhojpuri_song_2019.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_off00007ad4.bin
3f9b7c665ba816da10a4b0c6d556e333391439fa6ca619e5c15e4bd7c4ff8a01
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD4 5428 bytes
font_01_sfnt_off00008d2e.bin
db6c32279a093ebedb6c6b8475224b20503f4c405a9a5e66c0131f389ef02bd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2E 14676 bytes
font_02_sfnt_off0000bb4e.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4E 4324 bytes