Malicious PDF — malware analysis report

Static analysis result for SHA-256 1175e6d64655f4a8…

MALICIOUS

PDF

44.9 KB Created: 2020-08-31 04:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c6441b5f86ef308a8ff0b95d6474b44 SHA-1: 851c5886296244051dd748c7739d81e44f59f1b4 SHA-256: 1175e6d64655f4a87d896b705c0ddc75640f2a1dc28a48d986b9c0c59f029b2d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL, https://ttraff.cc/wix?keyword=forgiveness+worksheets+pdf, is presented as a lure for "forgiveness worksheets pdf". The file also exhibits characteristics of a link farm, with many links pointing to benign Shopify-hosted PDFs, likely for SEO manipulation. No scripts were extracted, but the presence of malicious redirector links strongly suggests an attempt to lead users to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=forgiveness+worksheets+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/xotepiwixisovebokix.pdf
    • https://cdn.shopify.com/s/files/1/0434/7212/6117/files/79357542053.pdf
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/vapuninelobezawilodine.pdf
    • https://cdn.shopify.com/s/files/1/0433/3256/7195/files/82329732562.pdf
    • https://cdn.shopify.com/s/files/1/0429/7523/2153/files/bible_numerology.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/59000183109.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2101/files/17642163213.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/tosesosozajatowoluvali.pdf
    • https://static.usrfiles.com/ugd/c3548c_bc5eebbe763246bc8fb311a426d3a9eb.pdf
    • https://static.usrfiles.com/ugd/565485_01fc219348f04f839d9895ba3fe16613.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2b9532331dc4e2fb6faa92178c372c5.pdf
    • https://static.usrfiles.com/ugd/ee6770_cb427732c28f42cf98a81bda6a8c0b7d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a780ce450f614092ad228dac8e8e6997.pdf
    • https://static.usrfiles.com/ugd/856cea_ee5bdfd2a0d64fd086f3a892037eef50.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0815ec8331345a7bc46d36015fc39ff.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006466.bin
a9d50de41800793efb10543c5de491f8bc37e77f957c486f3ff2d68b52a3798c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6466 5020 bytes
font_01_sfnt_off00007593.bin
6e9431365b27c122c99c9980e01def129c39de2b034b072e0e1681eebf6da80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7593 10244 bytes
font_02_sfnt_off000098be.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98BE 4324 bytes

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