Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2faa61ff43bd77…

MALICIOUS

PDF

46.2 KB Created: 2020-08-30 12:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 955b0bc8fedb9efcc42e09a71353edfb SHA-1: d916eae04481e71f3f8f18a4d3afe194e6396ab9 SHA-256: bc2faa61ff43bd775070697a5f8b3bb50b964d49a1cef458073bb170214cea7b
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, which is also present in the document body. The link, 'https://ttraff.cc/wix?keyword=drill+bit+size+chart+pdf', is designed to redirect users to malicious infrastructure. The document body, though partially garbled, indicates the lure is a 'drill bit size chart pdf'. The presence of a large number of 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.cc/wix?keyword=drill+bit+size+chart+pdf
    • https://static.usrfiles.com/ugd/d54300_909fef220b2c4bfb8f3cc8eeffca7136.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cf5d56a661243fba9817a90c2b050e1.pdf
    • https://static.usrfiles.com/ugd/b8c837_f68ba551c4664203a2ecacec1817c8da.pdf
    • https://static.usrfiles.com/ugd/b910ae_58e87215d37648f288aa476ebdf255f7.pdf
    • https://static.usrfiles.com/ugd/55cc32_e712fe5c96ce496c85b64ad6f812f779.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/52076303975.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/16735461650.pdf
    • https://static.usrfiles.com/ugd/b8c837_8eae251b4b8e4c9ba249b3909f9d088d.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_7476274692174a649703a8f5ac2f0940.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_off00007689.bin
59269aef77446b77a606baaddeeb81b71c508bd20190837c020bac71acf42323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7689 5432 bytes
font_01_sfnt_off000088f8.bin
d684116b804e64675d5f39be05ce2dac71012821a137a259176de4637e739884		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88F8 10364 bytes

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