Malicious PDF — malware analysis report

Static analysis result for SHA-256 572c434e405f6d8c…

MALICIOUS

PDF

44.0 KB Created: 2020-08-03 07:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2ce8c046ad0322e1041a0c6e22e833d SHA-1: 588b5ea66a7a9d89955f2ba377e2897faa578a15 SHA-256: 572c434e405f6d8c311baa6d73f33a73c5345e0764830f4b1cd326afb38e2e9b
130 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content, but the primary link redirects to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the URL https://ttraff.com/pify?keyword=calculus+by+howard+anton+5th+edition+pdf is part of a known malicious redirector chain. The document body, though heavily obfuscated, contains this malicious URL and several other benign-looking PDF links, likely to disguise the malicious intent. No scripts were extracted from this sample.

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=calculus+by+howard+anton+5th+edition+pdf
    • http://files.ave-design-co.com/uploads/1/3/2/3/132303359/mupuzoju.pdf
    • http://files.welchesterwellness.com/uploads/1/3/1/0/131070718/8132347.pdf
    • http://files.montanalanguageteachers.org/uploads/1/3/1/3/131379217/81740e7af12a7b5.pdf
    • http://files.ridgewaygardendesign.co.uk/uploads/1/3/0/9/130969334/leroxukedinune.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/27241706374.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/91070111770.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/nopiwimubuwozomufoku.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/4391980830.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/zekanatibikorezan.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3173/files/daisy_powerline_340_disassembly.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/pinivobilodiwozat.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/45483737847.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/47708090386.pdf
    • https://cdn.shopify.com/s/files/1/0440/7758/0453/files/hollow_knight_joni_s_blessing.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61927850068.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/repabivuwegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5892/1621/files/gofonakivog.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_off00006be7.bin
8a7bbba96be22c5e01e4c602ee85805fe9489d6edb0b5f6784283ec082850474
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 5608 bytes
font_01_sfnt_off00007f09.bin
e4b11c20beb5b35101eb92e49ef7f3329b8ecd2c1c1e4d76119a11b54313cb20
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F09 10436 bytes