Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b17b5b9e9e86e8…

MALICIOUS

PDF

40.6 KB Created: 2020-08-18 17:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 401de55858043d010f98f0b2b1ed034f SHA-1: 1b1115d97ac742bb9c5aa7e1f86a8ae6628cefaa SHA-256: d6b17b5b9e9e86e8b09651ed85f8a92de5205e7f1b2e602c0c8becd51fd8379a
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.com/pify?keyword=san+2019+ka+calendar'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, suggesting a link farm for SEO manipulation or to host further malicious content. The document body, though partially corrupted, also contains the primary malicious URL and several benign-looking Shopify URLs, likely used to obscure the malicious intent. No scripts were extracted, but the primary attack vector appears to be luring users to the malicious redirector.

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=san+2019+ka+calendar
    • http://dunovikud.apemaustralia.com.au/uploads/1/3/1/3/131398591/5940c9.pdf
    • http://files.forestandwatersolutions.com/uploads/1/3/1/3/131380263/janikuxax_mijidikog_dutijar.pdf
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/antonyms_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/44346104550.pdf
    • https://cdn.shopify.com/s/files/1/0435/8042/4351/files/5512126960.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4322/files/wiwidipuwolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/19388962886.pdf
    • https://cdn.shopify.com/s/files/1/0431/5381/7762/files/56686822524.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/convert_to_word_app_for_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0449/0631/5943/files/hotmail_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0783/files/guzaniporaveti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/75400770671.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/beauty_and_the_beast_prologue_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/matufalidalokilezelozanev.pdf
    • https://cdn.shopify.com/s/files/1/0435/3730/1653/files/vikeroserakobaxidefoji.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_off0000558c.bin
3b116e1856434d592d2afeff24a1820f8d280679c5ac8455ca744a4d32cea2d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x558C 4952 bytes
font_01_sfnt_off0000665b.bin
18f831b39ce6284f4ac97702e10138a6651e126d9dbd524fa920f3087a3c8f19
pdf-font-stream PDF embedded font (sfnt) at offset 0x665B 9704 bytes
font_02_sfnt_off00008798.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8798 4324 bytes