Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab8e3f418268c15…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 19:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b1d6f4ca7f2af52effcc12e9b9793f9 SHA-1: aff5f23c26495766d49fbbff7c0a570594ac29aa SHA-256: 0ab8e3f418268c15fc69352f55d4190d18d7d3cd866cbf29e75d3c2a996e4ff5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a mass of external links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'msi laptop camera driver windows 10' and the malicious URL, suggesting a lure for users seeking drivers. The ML classifier strongly flagged this PDF as malicious, and the presence of a malicious redirector indicates an attempt to distribute further malware or conduct phishing.

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=msi+laptop+camera+driver+windows+10
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/romeo_and_juliet_blank_timeline_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/circuito_rc.pdf
    • https://cdn.shopify.com/s/files/1/0431/5951/9387/files/72353344116.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/the_murderess_alexandros_papadiamantis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2383/files/darobewumof.pdf
    • https://static.usrfiles.com/ugd/7ff653_2abe1934944345b6813dc6df15e63f01.pdf
    • https://static.usrfiles.com/ugd/05301a_fdedd516bd4a4c30b08d31e48bd65c80.pdf
    • https://static.usrfiles.com/ugd/764aaa_5b3deaa0c4284f6ab480468591ea6a58.pdf
    • https://static.usrfiles.com/ugd/e1d12c_444bac98637a4463bba2957a7cbdbad1.pdf
    • https://static.usrfiles.com/ugd/0c268c_0c7aaf5b41c8436683d67c58d7d66503.pdf
    • https://static.usrfiles.com/ugd/585b1d_03d7f1abd52d4e7497acc5309cdfa9dc.pdf
    • https://static.usrfiles.com/ugd/b80405_83dbfeed302d4e2197f0868799f387e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_cde91360c2b04a0e9cef79a83c07b317.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a8e558f2e084f9bbdb3e8fb9e034ad9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9651985c44f0437dbdaa0d365ca0ab8f.pdf
    • https://static.usrfiles.com/ugd/5899d5_aaf37463ffd349b5bd5889eb21b025c4.pdf
    • https://static.usrfiles.com/ugd/7f46b5_522c6a4a543942849f7bdfad7ed7f820.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ca9.bin
e29bcb1dd7eccf4171c0fb5cdcdd90b6bbd83208cdb6abb9ff33d09313a7e657		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA9 5572 bytes
font_01_sfnt_off00007f9a.bin
67beed3bd21c44c63d67d86fc41a8e6965a8fbde7bfb3dddcf1b8e402a5a0a9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9A 10236 bytes

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