Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc4b0c3acb6fe0b…

MALICIOUS

PDF

47.0 KB Created: 2020-08-31 16:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90d2a6aa88e7d8a04a095ac69455e6ce SHA-1: d883b8ee1787b08ffdf9826bf9a2a34932e08c14 SHA-256: fcc4b0c3acb6fe0bd6bf3eb2f2aca3f5539504ca0c8190235c8787bf4972fe99
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=gst+annual+return+form+excel+format'. The document body, though heavily obfuscated, also contains this URL and references 'gst annual return form excel format', suggesting a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely for obfuscation or to appear legitimate.

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=gst+annual+return+form+excel+format
    • https://static.usrfiles.com/ugd/5be868_834b42ff50f24804ad1bd9564580b4f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fcee2258a4d418ea635d4094cd36c73.pdf
    • https://static.usrfiles.com/ugd/d90490_f62b5583e17b4c03927721e20f54ce7c.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/mikhail_botvinnik_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/9492/4694/files/gonuxavifapitelulod.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/32239527760.pdf
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/44357242264.pdf
    • https://static.usrfiles.com/ugd/cb4a18_8acd4f3894ba4c1ca69044d0bd8c7b3d.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_f19b36bbf001468cb06be83936faf5f5.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_23f3b20ec8a74a96995ebab1081a102c.pdf
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/free_cv_template_microsoft_word_uk.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/fisiopatologia_del_absceso_hepatico_amebiano.pdf
    • https://cdn.shopify.com/s/files/1/0438/6983/1323/files/bastille_flaws_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/jinoxeles.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_off00007a36.bin
6b1f2af8de6c5a19152575d1780380df98d8fcf2c63d4ca0f5b4a64912727cba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A36 5128 bytes
font_01_sfnt_off00008b97.bin
18a270ef09ec618c62806a30fba45eb01a0a8587c9f803c0cf571756ec82ef67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B97 10572 bytes

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