Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a9ecec2bcc559d…

MALICIOUS

PDF

47.2 KB Created: 2020-08-11 15:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 827194a83fb742fb3af33fb5fda3117b SHA-1: 384b6f325e8c84a7ec1ca68ca7a27c5c1a27ab64 SHA-256: c8a9ecec2bcc559db1789838064b345908251eeec0312d8916eb3c8f0b518d77
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are hosted on domains commonly used for SEO spam and link farms. One critical heuristic firing indicates a direct link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to the links, suggesting a lure to download further 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.cc/pify?keyword=the+life+of+the+buddha+bhikkhu+nanamoli+pdf
    • http://files.nickidenicki.com/uploads/1/3/1/6/131636947/keguxusanilipel_xilikekonepo.pdf
    • http://zovugas.jesmicjewelry.com/uploads/1/3/0/9/130968996/b0f7501dc46d.pdf
    • http://files.crowncharlotte.org/uploads/1/3/0/9/130969681/mewevan-wibuxamumabavok-dovexugibo.pdf
    • http://files.willowstogo.com/uploads/1/3/1/4/131407135/731771.pdf
    • http://files.qrufundraiser.org/uploads/1/3/0/7/130776486/nuwarelebawuxi-jizaxeru-taxulasobup.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/place_value_chart_printable.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/60967602779.pdf
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/majibis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/22168299118.pdf
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/36082401.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9550/files/warogeturorofikewu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4050/files/cyrano_de_bergerac_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/ada_2020_diabetes_gestacional_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/8783961004.pdf
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/57153757352.pdf
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/dexopemexododad.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4854/files/agriculture_information.pdf
    • https://cdn.shopify.com/s/files/1/0435/9743/0941/files/arquitectura_de_computadoras_utn.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_off00007a2e.bin
43b02790e0eb4360c153853b755f4d0693c06de9ee6d17fc7d71baab59bb0fc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2E 5160 bytes
font_01_sfnt_off00008b8c.bin
5e8d855e3d4cef778e19046fa18b65677968b6d4976219d92c2ab78e3a3a7c65
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8C 10652 bytes