Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4540cdc4722cf0…

MALICIOUS

PDF

47.9 KB Created: 2020-08-31 15:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2c3a99b611979e099d54ee2c3f9834c SHA-1: b3126453cc3450aebf08bd8c3021821c483dee09 SHA-256: 5c4540cdc4722cf002a2f48ce280647a1b5e31ae926f0aa45064266abb397bad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body text, though garbled, includes a URL that matches the malicious redirector found by heuristics. This suggests a phishing or scam attempt designed to lead users to malicious infrastructure.

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=ciena+3930+user+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/dosinorojexaraxifuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9047/files/ejemplos_de_tesis_de_administracion_de_empresas.pdf
    • https://cdn.shopify.com/s/files/1/0431/1125/2132/files/845957033.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/martin_lawrence_snl_monologue.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/gomikizema.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/85787230295.pdf
    • https://static.usrfiles.com/ugd/824332_cf6cd7a347ac4c5c8a3c4ab5cb859504.pdf
    • https://static.usrfiles.com/ugd/ea78e0_3cc66465a6c94ed0a6e9e3cf4081b7f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a48fdee1769d4996ab14cc2f69dff205.pdf
    • https://static.usrfiles.com/ugd/5b5da7_2238ecfecd3f407391cabbe18f9c3e51.pdf
    • https://static.usrfiles.com/ugd/6846fe_f0c5b579817e484da6c0ffc55601e49e.pdf
    • https://cdn.shopify.com/s/files/1/0463/2517/0331/files/barfi_hd_movie_filmywap.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/pelipuboxasifikeguvaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1318/files/kezaguvulefufezir.pdf
    • https://cdn.shopify.com/s/files/1/0439/0672/8091/files/facetime_audio_says_answered_on_another_device.pdf
    • https://cdn.shopify.com/s/files/1/0441/3181/1480/files/60933223584.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cc.bin
359ec1d1bdab7e8fd145e77c9189492644b262a54a49e94ab4d7852ea332bca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64CC 5008 bytes
font_01_sfnt_off000075a0.bin
592c0033c2c2c1322408e07c34336176db83c962d3f58a30fe7fac63427d9d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A0 15284 bytes
font_02_sfnt_off0000a4d4.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4D4 4324 bytes

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