Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2b4c946de59cef…

MALICIOUS

PDF

56.3 KB Created: 2020-08-10 21:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b299a911d31992255a4fb384a2da30f0 SHA-1: 19bb07b23f185306d8acb8283d5ebb2dd895e04c SHA-256: 4c2b4c946de59cef4839da6b3ec6c10a2b651778f1af2b6696a4fb8737c5f9fc
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious link identified is https://ttraff.cc/pify?keyword=all+dog+breeds+in+the+world+with+pictures+pdf, which is known to lead to malicious infrastructure. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection tactic to deliver a payload. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=all+dog+breeds+in+the+world+with+pictures+pdf
    • http://files.anniemeekmontgomery.com/uploads/1/3/2/6/132695633/perutimofubadomimino.pdf
    • http://pesore.vincentrussodesigns.com/uploads/1/3/0/8/130814328/ruxobijaja-judokanime-wexuv.pdf
    • http://files.andcreation.ch/uploads/1/3/0/7/130776101/donimijosolisaj.pdf
    • http://files.keepcalmwaxon.com/uploads/1/3/1/1/131164538/famaxevawagurixu.pdf
    • http://files.alexbowlerevangelism.com/uploads/1/3/1/6/131607075/redefivevakototu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/neretidesalefadim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/44296835782.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/pixijotenerigoxurumem.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/32375411.pdf
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/70932842100.pdf
    • https://cdn.shopify.com/s/files/1/0439/0082/9848/files/46118507899.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/43894911753.pdf
    • https://cdn.shopify.com/s/files/1/0432/6293/5200/files/all_he_ever_desired_shannon_stacey.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/70026529279.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/23813921905.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/novubadoso.pdf
    • https://cdn.shopify.com/s/files/1/0432/1017/8717/files/11503872565.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vujunuvitiwowus.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_off00009e77.bin
42d5a65a550277952e6a3d3e2b0ee981dc0376eb4f8040c796084421edf980bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E77 5428 bytes
font_01_sfnt_off0000b0fc.bin
405ff1d962f32f5a92f60ed2dd18aa92daba3431afbb809a90be3ca94ad93a6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FC 10152 bytes