Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b9cae0fce6e945…

MALICIOUS

PDF

43.0 KB Created: 2020-08-11 19:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aef26f3ae89205f281acc2ca4ab07367 SHA-1: fda6c6f2ed5b28f4208880372199a7147158c39e SHA-256: 33b9cae0fce6e945f76306ac5fecce21895a370955a9fe86a91c8ae2e2f3533e
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'pdf annotator full programlar' and a URL that aligns with the malicious redirector. The presence of a link farm and the lure of a 'full program' suggest a social engineering tactic to drive users to malicious sites. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be part of a multi-stage attack, potentially involving a password-protected archive.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=pdf+annotator+full+programlar
    • http://files.youthactionmemphis.com/uploads/1/3/1/6/131607321/kinuvexenugawagewefa.pdf
    • http://files.pelegreenberg.com/uploads/1/3/2/6/132695445/linivepos_lusufad_wubozi.pdf
    • http://files.peteaturner.com/uploads/1/3/1/4/131438111/2522639.pdf
    • http://numik.rosedaleyouthsoftball.com/uploads/1/3/1/3/131384635/d6fb922.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/xubupuredigewigixugo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/45993444232.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/wow_7._1._5_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/gepuxuwekutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5352/files/askeb_bendungan_asi.pdf
    • https://cdn.shopify.com/s/files/1/0439/0692/4712/files/dotako.pdf
    • https://cdn.shopify.com/s/files/1/0431/6138/7170/files/fofov.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1682/files/hallelujah_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/alto_sax_finger_chart.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/31543603636.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdf
    • https://cdn.shopify.com/s/files/1/0438/1078/3394/files/99368762787.pdf
    • https://cdn.shopify.com/s/files/1/0429/0913/9111/files/21424570932.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_off00005cba.bin
747d71ff92159bfa7086b698f84dc8acb4d0868aa9c224670c75ba8c7646233f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBA 5184 bytes
font_01_sfnt_off00006e3c.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 1800 bytes
font_02_sfnt_off000076c9.bin
e080f32c96c4d6b80fca5a24a7a8ea5d36ae32ac70ed65772c000e77fffd06f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x76C9 12504 bytes