Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83d279f82074096…

MALICIOUS

PDF

40.0 KB Created: 2020-08-23 18:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0904e97c322fdf33b09b7159110ff8d SHA-1: 16f8551c1c4c64702eb30eeacf7ac83118b00b3a SHA-256: f83d279f8207409679774aaf844fa2ce65bffaab005cb2a9c52a7e19cb894811
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'Form for uk passport renewal', suggesting a phishing lure. The presence of a link farm and a malicious redirector indicates an attempt to direct users to malicious infrastructure.

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.com/pify?keyword=form+for+uk+passport+renewal
    • http://files.trustitentertainment.com/uploads/1/3/1/6/131637362/6724737.pdf
    • http://files.revfrankmcfadden.com/uploads/1/3/0/7/130738792/6004182.pdf
    • https://cdn.shopify.com/s/files/1/0434/0622/9662/files/zupipatumezuvuvamujutu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/irony_worksheet_5_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/battle_chasers_nightwar_android.pdf
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/dolphin_emulator_xbox_360_controller_profile.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/54782631448.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2520/files/consignment_account_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2894/files/scansnap_s1100_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/tamimonovowasofu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/49926018113.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/falapogusi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/soxudafetigefotogipokuja.pdf
    • https://cdn.shopify.com/s/files/1/0428/4094/8892/files/williams_hematology_10th_edition.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_off00005eb7.bin
8690dea370f2fcc032b92d721533d48ed508b892d71faa73a3e385240760de83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB7 5156 bytes
font_01_sfnt_off00007043.bin
d44d3b5a51283b10157013d092d38d3e848127b60ed2aecc401bc6258ab9b4f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 10280 bytes

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