Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6ebabf6c5d3dc7…

MALICIOUS

PDF

44.0 KB Created: 2020-08-01 13:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff95b66d24ce8292a148e03ae845f480 SHA-1: 8b7280dd6b55e8a6185c5fbfd0042601537ddf62 SHA-256: 7c6ebabf6c5d3dc71226e9498f0b60165c2972a35881f5a2efc9d2afcf3647fe
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=icnd1+practice+exam, which is likely intended to lead the user to a malicious site. The presence of numerous PDF links suggests a SEO-based distribution tactic.

Heuristics 3

  • 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.
  • 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=icnd1+practice+exam
    • http://files.donegalfoundation.org/uploads/1/3/2/7/132712369/aa1deda259c67.pdf
    • http://files.michaelalombardo.com/uploads/1/3/1/4/131406478/4569b1e87e2.pdf
    • http://files.ptlg.net/uploads/1/3/1/3/131398308/xiwasusijukob.pdf
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/nunopuvugin.pdf
    • https://cdn.shopify.com/s/files/1/0438/3073/9106/files/82627051823.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/97864740211.pdf
    • https://cdn.shopify.com/s/files/1/0429/7218/4732/files/59725204833.pdf
    • https://cdn.shopify.com/s/files/1/0435/1347/9320/files/36303595571.pdf
    • https://cdn.shopify.com/s/files/1/0437/0651/5611/files/serajuwoxekogofasolitok.pdf
    • https://cdn.shopify.com/s/files/1/0428/3629/5836/files/wewobijorixagukiwep.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/95231114522.pdf
    • https://cdn.shopify.com/s/files/1/0435/4896/7061/files/the_body_beast_eating_plan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/nosavovijesumepukupijikim.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_off00006aa3.bin
56da9c0dd1b44dfe25ff399ed2db8d0be97de193261ee034413f6813a3146c5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA3 5068 bytes
font_01_sfnt_off00007bd5.bin
659e190be651dcd164a4108d582102bb442a6f8c115731f5c29f0c5665e5f142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD5 11380 bytes

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