Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b642696374aed4…

MALICIOUS

PDF

44.0 KB Created: 2020-08-19 07:33:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5321b700e8ca3c26c1e4d4ab9b087c98 SHA-1: e3cea6378bbef65386171259b4c2558e9d251f94 SHA-256: 20b642696374aed40b697623ded6db103dc9743511d13a8e4d1949bfcd0021f1
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on Shopify but some point to suspicious domains. The presence of a 'download button' lure further supports a malicious intent. The document body, though heavily obfuscated, contains the malicious redirector URL and several other PDF links, suggesting the primary goal is to redirect the user to potentially harmful content.

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=brom+error+s_brom__da_fail%2528+2004%2529
    • http://vasaziloz.mrisar.org/uploads/1/3/1/4/131453134/ad89007bf.pdf
    • http://boxezakot.413arearaconference.com/uploads/1/3/1/3/131379362/guvop.pdf
    • http://files.uogmediafest.com/uploads/1/3/1/4/131453530/datisab-jegafaputuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/76747729451.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/21325463849.pdf
    • https://cdn.shopify.com/s/files/1/0432/5782/3390/files/puxigipevowemeziv.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/babopegi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/tojipamogi.pdf
    • https://cdn.shopify.com/s/files/1/0437/2958/4282/files/40328954241.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/best_corporate_branding_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/2324/5207/files/42680735947.pdf
    • https://cdn.shopify.com/s/files/1/0438/6865/1680/files/report_a_chuckhole.pdf
    • https://cdn.shopify.com/s/files/1/0430/6586/8437/files/ignite_eir_aoi_piano_sheet_music.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_off00006136.bin
6e663640af3ae74a1cc655b210e25347a024818e176b42f3bd23ff1ba52d640f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6136 5788 bytes
font_01_sfnt_off000074e7.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x74E7 1800 bytes
font_02_sfnt_off00007d75.bin
d8cce4727ae0520fc614fecba32b2d25c725abae3ca70b4ff2116e7a9d47152b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D75 10480 bytes