Malicious PDF — malware analysis report

Static analysis result for SHA-256 3978b0e59910790a…

MALICIOUS

PDF

41.6 KB Created: 2020-09-01 22:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b361566abfee93181c29cddc285f56a SHA-1: 16e005c268417ea88a48d9aa0aa31e5d7f8bf815 SHA-256: 3978b0e59910790afb283c35ce17a52616b546ec5a0655426bc74d932e8f6c86
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector infrastructure at `ttraff.cc`. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose of the PDF is to act as a link farm, leading users to potentially harmful content via the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=dementia+treatment+guidelines+pdf
    • https://cdn.shopify.com/s/files/1/0440/4540/2277/files/admission_form_for_fashion_designing.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/petewimafujavirewanabew.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1358/files/oxford_english_dictionary_latest_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/biografia_de_pericles.pdf
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/allahu_akbar_allahu_akbar_song.pdf
    • https://static.usrfiles.com/ugd/15d534_6235a50ee3824959aa148cb25280bca2.pdf
    • https://static.usrfiles.com/ugd/b8c837_8132d3fdb9784b30994ab5ca9dbca23e.pdf
    • https://cdn.shopify.com/s/files/1/0437/8951/6958/files/ukpsc_exam_calendar_2019.pdf
    • https://cdn.shopify.com/s/files/1/0438/9430/9019/files/two_mexican_dances_for_marimba.pdf
    • https://cdn.shopify.com/s/files/1/0459/2451/5989/files/1397514217.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/96781218960.pdf
    • https://static.usrfiles.com/ugd/b8c837_1392575240b14d89a4cb768ed99e1fc9.pdf
    • https://static.usrfiles.com/ugd/defcb2_c32986c17a0744fa891da3d0e46be1d0.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_off000064b2.bin
ff2479cfe5731cbf390cd4b34db116aa1dc5ce622788f047dfc6f5fb246f9de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64B2 5360 bytes
font_01_sfnt_off000076db.bin
3c8ea93d2ebaef63c01ad44c6301353999f1d681358e434c4ec87924fc74a2a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76DB 10116 bytes

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