Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cd59454493b639…

MALICIOUS

PDF

66.7 KB Created: 2020-08-30 12:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8024c7ec303016319453d2cfef12239 SHA-1: 1d50b5664a9ffd34242cc7e0502af0ccf3af5202 SHA-256: 93cd59454493b6399962daae55ba9556f86537e62bef719abe3bb6a7664e408b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=shiloh+dynasty+sheet+music'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a lure to download further malicious content or redirect to a phishing page. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/wix?keyword=shiloh+dynasty+sheet+music
    • https://static.usrfiles.com/ugd/5af86b_2e4beafd05414ec2b5f8df1d61293821.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ab9fea6b2844dde98454f9542b0f382.pdf
    • https://static.usrfiles.com/ugd/0adedf_b10a4ca1de8c402fb159e967a177b659.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3b7e6ba1dcd4a3a8e9da07b81913988.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ee03e23c7834b4badc25baf5bd52fd3.pdf
    • https://static.usrfiles.com/ugd/8b49c6_3064d38aa36b4409ab866298e99f3f14.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fb4484087e64ace9d7fdfd0b98e83e3.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/bezukojulupelonu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2473/6678/files/avengers_theme_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/mixuro.pdf
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/its_vs_it_s_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8511/1203/files/57134184573.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2821/files/knjige_beletristika_free.pdf
    • https://cdn.shopify.com/s/files/1/0461/0814/7876/files/wuzuruvekazona.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/tatapuba.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/the_falls_movie_times.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/desezurugubegeseti.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_off0000b3b2.bin
b2aeae86889a95486aa832ec825c84949e8efcd5600739ea66ad36ddcb6cc4dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B2 5288 bytes
font_01_sfnt_off0000c589.bin
be9d5751bfe0716be1a0af2e23da9a857f38dfbd81dd5ebd97694abfb779ae55		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC589 18412 bytes

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