Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d26cfa2da6a496…

MALICIOUS

PDF

43.3 KB Created: 2020-08-12 19:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecb9249b0e4f77172067ba76901e0fd0 SHA-1: 738f19feedf3c957930718cc6298db892d4f0d83 SHA-256: d7d26cfa2da6a496369cfdb12729e71e62684954fe8c3099698dfe1c7e5137f8
130 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body text and embedded URLs suggest a lure for 'bank exam preparation books' to trick users into clicking the malicious link. The presence of a visual download button further supports this social engineering tactic. The primary malicious URL is https://ttraff.cc/pify?keyword=bank+exam+preparation+books+pdf+download.

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=bank+exam+preparation+books+pdf+download
    • http://files.allthingsprettymarket.com/uploads/1/3/0/9/130969987/witidasasatiw_rulodazobolaror_ximeforu_buverebomeb.pdf
    • http://files.walkforwildflorida.org/uploads/1/3/1/4/131483029/8515164.pdf
    • http://bunujow.threecreekaussies.com/uploads/1/3/1/3/131380429/rawadumavip.pdf
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/ubuntu_macbook_wifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6862/8892/files/53723632429.pdf
    • https://cdn.shopify.com/s/files/1/0428/9350/8771/files/oncology_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0432/2109/0471/files/kifowamixerada.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0486/files/51553776176.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/resume_letter_for_teacher.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/puxubol.pdf
    • https://cdn.shopify.com/s/files/1/0428/3822/9158/files/nedodi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/zoxizufesuluxudoxemusepi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/porovurujapiganipuzul.pdf
    • https://cdn.shopify.com/s/files/1/0434/2494/0184/files/aws_api_gateway_tutorial.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_off00006787.bin
b2769570a1e2ddf953cea0e971375643e1930dafa2ff4a4a5c240278be3e671c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6787 5600 bytes
font_01_sfnt_off00007a87.bin
a36c51b6b96b190cd1725a3c86d26235d13fe6b54295a3182c4e2f089ca90090
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A87 10612 bytes