Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63bb494fa85eadd…

MALICIOUS

PDF

48.0 KB Created: 2020-08-22 02:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b562bc6d1034db65169841a13d380e0 SHA-1: d68608c6aea876346bb94a8d1299122bb74c077f SHA-256: d63bb494fa85eadd980d916312affd3ca202f3ddedcd1cf4f5fc35f0e72670bb
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, forming a link farm. One of these links, https://ttraff.ru/pify?keyword=anderson+paak+song, points to known malicious redirector infrastructure. The document body is heavily obfuscated and contains garbled text, but the presence of the malicious redirector URL and the link farm structure strongly suggest a malicious intent, likely to lure users to malicious sites.

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.ru/pify?keyword=anderson+paak+song
    • http://files.sauer-int.com/uploads/1/3/1/4/131438180/b91cff36838c89.pdf
    • http://files.skeshmm.com/uploads/1/3/0/7/130774990/6850df9652b9.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37237973095.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85155057715.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/70711794856.pdf
    • https://cdn.shopify.com/s/files/1/0434/3880/1061/files/zomixakumejekurax.pdf
    • https://cdn.shopify.com/s/files/1/0440/8072/6168/files/medical_ethics_in_abortion.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/viwubi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/69920285624.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/11377303752.pdf
    • https://cdn.shopify.com/s/files/1/0433/0363/3051/files/abn_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/rirukezosekabigukefub.pdf
    • https://cdn.shopify.com/s/files/1/0439/4136/3870/files/work_week_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/zidugoziri.pdf
    • https://cdn.shopify.com/s/files/1/0431/0391/2098/files/pexotunufaru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000684b.bin
e0ed4d3d681d96c2b49b68b47cce94d36e0f76a7ad4808aa1728d082090d605e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x684B 5148 bytes
font_01_sfnt_off000079d6.bin
2ab123104c544030c94711cb12c0174e120a1ee3f000832d781638f245935cf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D6 10576 bytes
font_02_sfnt_off00009dfd.bin
10572f3a10760712fbb8352e098d229fd21f48763f52fb6fd9385479015ceb58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DFD 16060 bytes

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