Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4c0613a58166cd…

MALICIOUS

PDF

154.0 KB Created: 2020-11-01 18:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3ab973a68b3bfe951dddfdbb05aaeaa3 SHA-1: 7b888aea9eba2c783f26b3c3f977f8b503124558 SHA-256: 7b4c0613a58166cdddf2f67d56882b11213a033656550e29b24e47a912636d8f
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/123?keyword=play+minecraft+unblocked'. This URL is embedded within the document's body, suggesting a phishing or social engineering attempt to trick the user into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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/123?keyword=play+minecraft+unblocked In PDF document text
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/81075d1334c.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/14667cd53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5856/0661/files/7488414087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45e3e2a-dfe3-422e-a486-4addcce389b0/womajuzevipoxixaxexuseri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0306/7038/files/86669074555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/3_nephi_9_19-20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f6b190-33cb-44d1-81f7-5d2619f29a48/daniel_habif_biografia.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/lista_de_medicamentos_aines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04275ee8-4f59-49ff-a5a8-845c312a9138/43696167938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4782/2236/files/the_panel_station_legit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2808/4384/files/extensible_stylesheet_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4152/8257/files/salesforce_data_loader_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/employment_verification_form_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/nesawudujotiwidufosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cebacd4-ed12-40e9-8e65-8c3b1a463df0/14622350183.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/gelab.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00021beb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x21BEB 33900 bytes
SHA-256: e1ff5da1dd0ef50dc1a2708a852f7d597d5572d514181deb2088bba7a7fce41e
font_00_sfnt_off00013812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13812 7496 bytes
SHA-256: 0dfe5620f56e00ea373f54d346d6a855d7a549a904b4f0a5dca364c6e55c1535
font_01_sfnt_off00014b22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B22 37620 bytes
SHA-256: ced4b8917c3fdce4654ec1047de3f5827cd4e9629dc5f21e23b1ffbe39fb6866
font_02_sfnt_off0001c194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C194 5296 bytes
SHA-256: 3ed1169b7e169f50f5777ff14cc36bca04cc59f2a1d498dbd06df2387ba6a140
font_03_sfnt_off0001d381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D381 5804 bytes
SHA-256: 518178d90c7f508e07db72850366a5d69fbfc02c487cbdb560d86f7d557ffa8e
font_04_sfnt_off0001e21a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E21A 18572 bytes
SHA-256: 3708601e63943e17ad52a885708f3fdacefd6f21c52fd4539b5627fc00390c4a

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