Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb24325c4b3e1a9…

MALICIOUS

PDF

38.6 KB Created: 2020-08-07 05:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc10b4e2928db2e6c6936ab27c355ca7 SHA-1: d3e59ee14fcbd836b5b5ee0b45c44ac7743d4e2a SHA-256: bcb24325c4b3e1a930475d16fc10b2839252745d3073f664424ebc0f4003f4d9
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. The document body, though heavily obfuscated, contains text referencing "Attach pdf in mailchimp" and the malicious URL itself. The PDF also contains a large number of embedded links, many pointing to shopify.com domains, which is characteristic of link farm abuse. The primary malicious link is https://ttraff.com/pify?keyword=attach+pdf+in+mailchimp, which likely serves as a lure to a malicious 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.com/pify?keyword=attach+pdf+in+mailchimp
    • http://files.allianzconsultingsolutions.com/uploads/1/3/0/8/130874474/ffed9ed5c0ad.pdf
    • http://files.elizabethstaiger.com/uploads/1/3/2/8/132815866/5404855.pdf
    • http://files.teachinghooks.com/uploads/1/3/1/4/131408250/ebf8501f9.pdf
    • http://files.clean-lineblacktop.com/uploads/1/3/1/4/131406149/jotamixik.pdf
    • http://files.swaggerstateathletics.com/uploads/1/3/1/1/131163932/6908033.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/disney_plus_roku_app.pdf
    • https://cdn.shopify.com/s/files/1/0430/6409/8970/files/56737435182.pdf
    • https://cdn.shopify.com/s/files/1/0435/7708/2019/files/ap_us_history_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/zapasidedena.pdf
    • https://cdn.shopify.com/s/files/1/0432/5641/4363/files/74463216618.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/dinalotowuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/77544684842.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/74955349394.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5413/files/74967608029.pdf
    • https://cdn.shopify.com/s/files/1/0439/5122/7048/files/vibozajuvapexulam.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_off00005a0e.bin
7896c20aab622a0b8b9f7069f4a9c9893835f9c0928ea7bc241c97f9ea2eedd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0E 5112 bytes
font_01_sfnt_off00006b57.bin
90786da55f9471c1a003dae05d4c67c100a27b0fecef853176f4c7a5db387c2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B57 10200 bytes