Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5a5e323eef8f43…

MALICIOUS

PDF

43.0 KB Created: 2020-08-10 16:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d9c2a1f597d6e01286b14e4c2843811 SHA-1: a99b8e99af9a4fbc66e7ae71db12345f2708d1d4 SHA-256: bd5a5e323eef8f439a0b94a0c7b9bcefd064971a625b5ee6e507023075677802
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to traff.cc, which is known for distributing malware. The document also features a mass external PDF link farm, with many links hosted on cdn.shopify.com, likely to improve search engine ranking for malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or redirection attempt.

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/pify?keyword=vocabulary+words+related+to+education+pdf
    • http://files.pre-protein.com/uploads/1/3/0/7/130740174/4349104.pdf
    • http://xazafaz.adventuresinthird.com/uploads/1/3/0/8/130813528/potewobozudopel.pdf
    • http://files.ronnieroseband.com/uploads/1/3/0/8/130813797/a7f99.pdf
    • http://files.vimpsatthehockey.com/uploads/1/3/1/6/131637038/108680.pdf
    • http://bopezap.windsorpoetryslam.com/uploads/1/3/1/6/131607600/kekegowegilinuwan.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/35548188044.pdf
    • https://cdn.shopify.com/s/files/1/0433/4052/9816/files/popejax.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9887/files/chilton_manual_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/baslica_de_san_pedro.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/13891937477.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/mafiloduperewifij.pdf
    • https://cdn.shopify.com/s/files/1/0431/0535/3889/files/vopawuwakogefubelitofije.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/17362975573.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2719/files/html_telephone_link.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/puwatorirexironemixi.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_off00006b0c.bin
ac00e6723fdfca8c3519b100435db0744199f41e69899ff73e84b5bc0a0fc8cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0C 5448 bytes
font_01_sfnt_off00007dae.bin
aee8c6a039b412d7a03b372194094a27972d2feb33c97fb1fc2a795d68e69a40
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAE 9868 bytes