Malicious PDF — malware analysis report

Static analysis result for SHA-256 50bda07a00f0f482…

MALICIOUS

PDF

67.0 KB Created: 2020-08-21 00:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18f4bb477170097d4bae3f88d49799d9 SHA-1: d2302c13caaa7c37a79be5400960213520bb0931 SHA-256: 50bda07a00f0f48205e64f25e3e5327925f698ffaa6eec053a383b1d0310fdf8
92 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, ttraff.cc, which is disguised as a crafting guide. This indicates a phishing or social engineering attempt to redirect the user to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=delve+crafting+guide+poe
    • http://files.danielholihan.com/uploads/1/3/0/7/130740412/2854.pdf
    • http://voler.cmbuilders.org/uploads/1/3/0/7/130775432/5052861.pdf
    • https://cdn.shopify.com/s/files/1/0431/5414/5444/files/honda_hrx_217_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/64004320994.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/apollo_tyres_annual_report_2020_14.pdf
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/68481565582.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/msc_microbiology_mcqs_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/63955870502.pdf
    • https://cdn.shopify.com/s/files/1/0438/1877/8781/files/ziwerojeperutonuxidesil.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_off0000c9cf.bin
c4a50b13c047c1001aeb9af730235299c0eb88cfe08c0c15962b46f39981c7ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CF 5204 bytes
font_01_sfnt_off0000db98.bin
904c7b4edd2a52f715de38208fc4a57e402fe4bd87f620eba9b30c1ace2e86c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB98 10472 bytes

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