Malicious PDF — malware analysis report

Static analysis result for SHA-256 f555539590997a73…

MALICIOUS

PDF

35.2 KB Created: 2020-08-19 10:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64a00e9fa52609a3f7a838b546305759 SHA-1: cd3847dfb3a990d162d7eeff54bd01b2405f76d7 SHA-256: f555539590997a73abc78ab4dc9e24038e4931ba69b1e4917e65fe222f06f67c
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=adobe+pdf+add+signature+block'. The document body, though heavily obfuscated, contains text fragments suggesting a lure related to 'Adobe pdf add signature block', reinforcing the malicious redirector's purpose. The presence of a link farm further indicates an attempt to distribute malicious content.

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.com/pify?keyword=adobe+pdf+add+signature+block
    • http://files.jessicabashline.com/uploads/1/3/1/4/131482867/1816856.pdf
    • http://japaref.poseidonwater.com/uploads/1/3/1/1/131164239/7510285.pdf
    • http://files.juicefastingmaven.com/uploads/1/3/1/1/131163635/4678561.pdf
    • http://files.patrickwboyerjr.com/uploads/1/3/0/8/130873769/6e01ed76aba8b79.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/bepobagaxukibolukafawuso.pdf
    • https://cdn.shopify.com/s/files/1/0433/6074/7688/files/aarti_sangrah_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/2208/1448/files/74161722490.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4404/files/petovigekilam.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54748680829.pdf
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/wurowetoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3861/2378/files/understanding_the_mathematics_of_personal_finance.pdf
    • https://cdn.shopify.com/s/files/1/0438/8998/3640/files/31432033764.pdf
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/wotin.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/48617233801.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/japapazo.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_off00004d8b.bin
89b9116cce2318dcca7d07fc6b138fe9f26aee6413348a65be5df6036ca766f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D8B 5516 bytes
font_01_sfnt_off00006056.bin
4a6b3c9aa64cb62567f6901a2d13b31fb7605ef321e8d405607a51b4745e4cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 9276 bytes

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