Malicious PDF — malware analysis report

Static analysis result for SHA-256 b021202450274d39…

MALICIOUS

PDF

42.4 KB Created: 2020-08-21 20:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7acf47625b66b1ff812ee9bed9c78aea SHA-1: 852f5d85235aa4d2543ae5b5794e963fcd2ecf1d SHA-256: b021202450274d39cd7f7f5ff00d4745c1bc60745dd7e956c8fd22dfbbeaa02c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, disguised as 'Digraphs worksheets 2nd grade', redirects to a known malicious URL. This indicates a social engineering attempt to trick users into visiting a potentially harmful website.

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=digraphs+worksheets+2nd+grade
    • http://files.carrollspurco.com/uploads/1/3/2/3/132303151/7164254.pdf
    • http://zugodat.calvary-christianschool.com/uploads/1/3/2/7/132740373/xapezafagasi.pdf
    • http://jamija.kc-ink.com/uploads/1/3/1/3/131398008/parelovuvob.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2954/files/keleganojewapoxaxuwanip.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/adobe_reader_password_protect.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/25787578730.pdf
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/kujuzujasigojevigepuroke.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kawovuk.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1275/files/9114097745.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/atresia_pulmonar.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/bsc_3rd_year_chemistry_notes_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1786/files/area_and_perimeter_formula_for_all_shapes_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/git-_set-_upstream.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/ruwebi.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_off000054d7.bin
a9934b14f963e400852fdd2eb532060a1d9dadb20026578103ade0d4111e856d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D7 5264 bytes
font_01_sfnt_off000066d0.bin
4ec1524e5ef75a311cfded938f65b2ece6bf445e23bee48b4f80fb7625719bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 12472 bytes
font_02_sfnt_off00008e66.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E66 4324 bytes

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