Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fccdc4794b1ec7…

MALICIOUS

PDF

45.7 KB Created: 2020-08-11 05:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02b5e76332dbaa96c0fa0d06e5f6b9e1 SHA-1: 256532ebffe5ffdc64da046ba51562131c71f63d SHA-256: 99fccdc4794b1ec7950fc72e25bf47467d160391fa0ad6d76fc46ace110bb152
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to external PDF files, suggesting a link farm for SEO manipulation. One of the primary links directs to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to a 'Bose soundlink colour manual pdf' and the malicious URL, indicating a lure to trick users into clicking the malicious link under the guise of downloading a manual.

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=bose+soundlink+colour+manual+pdf
    • http://files.kisch.info/uploads/1/3/0/7/130775808/2519107.pdf
    • http://xenenojif.zenithcounsellingandconversation.com/uploads/1/3/1/6/131606289/46a60.pdf
    • http://tetaruje.verticalmilerally.com/uploads/1/3/0/8/130814179/zowerile_lononekokuge.pdf
    • https://cdn.shopify.com/s/files/1/0427/7351/2359/files/brinkmann_electric_smoker_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8874/8452/files/levananujubora.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94608223162.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/14066333719.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/sirir.pdf
    • https://cdn.shopify.com/s/files/1/0431/0751/6578/files/36513650630.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/89180704842.pdf
    • https://cdn.shopify.com/s/files/1/0438/9715/9832/files/pupajoba.pdf
    • https://cdn.shopify.com/s/files/1/0440/6411/2805/files/74911042471.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/wufukomu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3057/files/mikavunejoxarivotovef.pdf
    • https://cdn.shopify.com/s/files/1/0430/8094/1729/files/nj_st-_50.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_off000074bd.bin
d5fb800aa5b0a0f0423b4fc36f9dd9be982d66f669644fb996fcdb2195928b1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BD 5416 bytes
font_01_sfnt_off0000870c.bin
988c115164a8d6f788944426ef9b4225cc989a039924a1ec53dea0c22dd26f0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x870C 10228 bytes

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