Malicious PDF — malware analysis report

Static analysis result for SHA-256 b856245e0e2da9ad…

MALICIOUS

PDF

70.8 KB Created: 2020-08-05 11:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95d09180e62b024460cf0b1dfdf459ef SHA-1: cf8ff2decad3973dadf4860f76b169a26e473f5f SHA-256: b856245e0e2da9ad3817fc5b5474a6d5e377d37d65bc21f327c2a1b99e109b77
140 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=dell+poweredge+r740xd+specs+pdf'. This URL is likely part of a phishing or malware distribution chain. Additionally, the document exhibits a link farm pattern and a callback lure, suggesting a multi-stage attack. The presence of numerous embedded URLs, many hosted on Shopify, further supports the link farm heuristic.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=dell+poweredge+r740xd+specs+pdf
    • http://mirigigam.carinasunn.com/uploads/1/3/0/8/130814328/gesajinu.pdf
    • http://files.smallberrygreen.com/uploads/1/3/1/3/131398356/bexalir.pdf
    • http://files.themedicineway.org/uploads/1/3/2/3/132303175/e5637617032adf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/fundamentals_of_legal_argumentation.pdf
    • https://cdn.shopify.com/s/files/1/0435/0020/8294/files/gizubuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/15067027275.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/barnaby_rudge_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43127542751.pdf
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/zelufatinenalurizidusi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2853/6734/files/29883959297.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/31994149595.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37263727017.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/fetima.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/rebifimemiravule.pdf
    • https://cdn.shopify.com/s/files/1/0431/2684/9700/files/53292895650.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/principles_of_bioconversion.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_off0000c889.bin
25b10d7ee39375fad703fbee53a4bb83c53c206bdcc9e1981bce1ad4aaaddab3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC889 5580 bytes
font_01_sfnt_off0000dbd2.bin
389d5c07c461ce2bdb4c776a392d073ba5535bd529eacfb14d5bd2397a7167f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD2 16312 bytes