Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c5883809be8a2f…

MALICIOUS

PDF

40.3 KB Created: 2020-08-17 00:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06e94a55a10a9eab959045fc3b543fc0 SHA-1: 55b225773313e2e2d5df75a9845e4ff63d64c2db SHA-256: f8c5883809be8a2f02c6cca653030454d4fa558d846e6d7c68ea642588f8448a
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body includes the URL 'https://ttraff.ru/pify?keyword=call+of+duty+mobile+android+compatible+devices', which is likely intended to trick the user into clicking through to a malicious site. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=call+of+duty+mobile+android+compatible+devices
    • http://pigeloja.ship504.com/uploads/1/3/2/6/132695569/segirivawiwevi.pdf
    • http://files.oregondunestriathlon.com/uploads/1/3/1/3/131383384/6395803.pdf
    • http://files.ketsanafoundation.com/uploads/1/3/1/3/131379904/8072522.pdf
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/36170546771.pdf
    • https://cdn.shopify.com/s/files/1/0429/9970/9855/files/vunegosizedo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3391/0681/files/caia_level_1_sample_questions.pdf
    • https://cdn.shopify.com/s/files/1/0435/0548/3942/files/38443545088.pdf
    • https://cdn.shopify.com/s/files/1/0435/5666/7555/files/absceso_hepatico_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8223/files/14800024513.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/23768685828.pdf
    • https://cdn.shopify.com/s/files/1/0432/7781/1867/files/lion_king_dvd.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4495/files/applied_mathematics_2_for_bsc_it.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/77847176868.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_off00005e7c.bin
bca71de4899485ea8141cc44204ee8280c6bc8b4e99898473cb1687edf7bde25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7C 5508 bytes
font_01_sfnt_off00007127.bin
19e4be057688685bec0e1e9bab37fc78478e6de246c154136a8b627d276677d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7127 10224 bytes

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