Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48575df370ae3c8…

MALICIOUS

PDF

40.0 KB Created: 2020-08-13 23:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8bf61e3ef09e6a0397ce82b59a2ff7de SHA-1: d3f3771f83d5a5723f39157cd27cde7236294311 SHA-256: c48575df370ae3c8d9f985837da551b914e1c7db2b0ac3cddcd9a2d34fea7fb6
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 ttraff.com, which is a known malicious domain. It also features a link farm of external PDFs hosted on Shopify, likely for SEO poisoning or to obscure the malicious redirector. The presence of a 'download button' heuristic further supports the lure of clicking the malicious link. No scripts were extracted, but the PDF structure and embedded links indicate a redirection-based attack.

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/pify?keyword=grunge+brush+psd+free
    • http://files.trinibnb.com/uploads/1/3/1/3/131380052/1907250.pdf
    • http://files.southernairehuskies.com/uploads/1/3/2/7/132712355/1ee93b84e.pdf
    • http://files.charlenehuang5683.com/uploads/1/3/2/6/132696111/3207819.pdf
    • http://files.stlouistennriverpacketco.com/uploads/1/3/1/4/131437657/senoti.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0349/files/47042230883.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/80839951004.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0429/7087/4009/files/mowakefesatenolalitopago.pdf
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/34832249162.pdf
    • https://cdn.shopify.com/s/files/1/0428/4956/6886/files/41962442599.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7122/files/lukaviz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/lozasomewi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72710717911.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/puxusewurameriva.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0748/files/kubopivizet.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/heartstrings_south_korean_tv_series.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_off00005fa3.bin
f9b34d1144bb7f71bb6ce374daa8b82cbee8fa1f54721561ced3f7568da2a124
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA3 5232 bytes
font_01_sfnt_off00007166.bin
9aa17acb2fcde7f199c4ebb7ccf2346162e7f41c2712b7eac378b3996ebe3e4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7166 10244 bytes