Malicious PDF — malware analysis report

Static analysis result for SHA-256 5525596933e7d939…

MALICIOUS

PDF

36.4 KB Created: 2020-08-14 12:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9298aab024e5e9e7a6c2e65b9b280c1 SHA-1: 2a32e72e3adb31a609a6c04cc4909a77a5cff8f3 SHA-256: 5525596933e7d939cee2bba8a68d0cbeb5dfe1a058293bcb59e163af75d38a9c
130 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to a 'brother status video song in tamil' and the malicious URL, suggesting a lure to trick users into clicking. The presence of numerous PDF links, many hosted on Shopify, points to a link farm used for SEO poisoning or distributing malicious 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=brother+status+video+song++in+tamil
    • http://files.americanreferralconnection.com/uploads/1/3/0/7/130739712/6a27dd3f8420dc9.pdf
    • http://files.toddconover.com/uploads/1/3/1/4/131453276/xukikabifakiv.pdf
    • http://files.kesara.org/uploads/1/3/1/4/131406688/pazalibi-korurolotaw.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/tuvisadewoxonaza.pdf
    • https://cdn.shopify.com/s/files/1/0429/5226/1795/files/66974699594.pdf
    • https://cdn.shopify.com/s/files/1/0446/1517/2259/files/south_african_national_anthem.pdf
    • https://cdn.shopify.com/s/files/1/0436/0414/8381/files/3771615824.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/62504875119.pdf
    • https://cdn.shopify.com/s/files/1/0437/2765/0970/files/tewalulegifevasubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8212/files/75358366094.pdf
    • https://cdn.shopify.com/s/files/1/0440/5713/3221/files/quimica_general_atkins_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/1000/files/rezukorusixewige.pdf
    • https://cdn.shopify.com/s/files/1/0447/9824/7069/files/bayesian_regression_with_inla.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pesaveput.pdf
    • https://cdn.shopify.com/s/files/1/0437/4983/4901/files/90100993805.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_off00004f60.bin
caea42890f5ef6ae6c918760058018c4d65fd3f2313e4a40a0b54e72aeed3711
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F60 5348 bytes
font_01_sfnt_off00006167.bin
4afda759702c51ec5c724b2b2ed269a7f0691259242669de8a09d2ecb102e7ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6167 10344 bytes