Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdc89776d6adadf…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 16:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94ff5864fd9a05c7bedd0f729a9558ed SHA-1: f2ac5823c43c0a944005553d563e5ef44a609a2f SHA-256: 8cdc89776d6adadfc504c2b0562f49cf9cad5aa1f3167085a6a8f8a1ed34953d
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=stacked+bar+chart+android+example', which is likely used to direct the user to a malicious site. The presence of numerous external PDF links also suggests a link farm or SEO poisoning attempt.

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=stacked+bar+chart+android+example
    • http://files.uniquecelebrationspartiesandgifts.com/uploads/1/3/1/4/131437736/totatumor.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/49734330189.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/biometria_hematica_en_embarazadas.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/digitodoxajunupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/39305336791.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4525/files/75367640526.pdf
    • https://cdn.shopify.com/s/files/1/0432/2459/6642/files/4902317998.pdf
    • https://cdn.shopify.com/s/files/1/0432/6647/4139/files/jiriwi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9421/1750/files/tusujiwalawodusunaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0431/3432/0794/files/1403422565.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_off00005b80.bin
996fda4a8c9c2f1a2cbe861a39e55ebbadfdc08b0e310696e45d6da81edaeda9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B80 5508 bytes
font_01_sfnt_off00006df8.bin
4af291ac6c378c6b2d793c4ead027a2e72d4d8c79d9226f528819b991ee21653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF8 2252 bytes
font_02_sfnt_off00007839.bin
c4e7b6046093cf0dc9d7b7042cde2f59ea93767ab23efd7f162d2f59fbdf0c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7839 10072 bytes

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