Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bb06ec158c5142…

MALICIOUS

PDF

48.1 KB Created: 2020-08-19 00:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5e800737b824aa005c9fcf1f746306f SHA-1: d2dea5b3aaeccaf0112db4c50a0f40d0cb93eade SHA-256: c2bb06ec158c514275943b91139403f26e2281a6a3e80f1e916d34672da80abc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a free calendar template download. The link leads to 'https://ttraff.cc/pify?keyword=free+calendar+template+2019+indesign', which is a known malicious redirector. The document body, though heavily obfuscated, contains text related to calendar templates and the redirector URL. The PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics confirm the malicious nature of the embedded links.

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/pify?keyword=free+calendar+template+2019+indesign
    • http://files.staytonfol.org/uploads/1/3/2/8/132813998/lesad.pdf
    • http://gimun.crystal-violet.com/uploads/1/3/1/1/131164250/2d0134645b.pdf
    • http://fiponexi.cnpwomensresourcecentre.ca/uploads/1/3/2/6/132682878/9901249.pdf
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/affections_touching_across_time_piano.pdf
    • https://cdn.shopify.com/s/files/1/0440/3865/2069/files/54317519647.pdf
    • https://cdn.shopify.com/s/files/1/0429/1638/0831/files/78408337487.pdf
    • https://cdn.shopify.com/s/files/1/0464/2403/1384/files/florida_vin_inspection_and_odometer_reading_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/arterial_blood_pressure_waveform_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/faxuzex.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6257/files/where_do_shield_volcanoes_form_plate_boundary.pdf
    • https://cdn.shopify.com/s/files/1/0430/9221/3911/files/xibedoreja.pdf
    • https://cdn.shopify.com/s/files/1/0438/1694/3778/files/narasimha_movie_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.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_off00007c90.bin
7281a92092f54a49df15db79d49dea4ea266e3d25f4b6fbee753714e78ad470f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C90 5828 bytes
font_01_sfnt_off00009052.bin
66d5aca008aa9321a2a100dfe56a64406a0e4ffc20bcc7d4231f34d97cd02d70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9052 10252 bytes

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