Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f62ac3859627af3…

MALICIOUS

PDF

90.0 KB Created: 2020-08-31 12:25:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0131623b9fb7e747fc5a438b734e5612 SHA-1: f2889593511c0f36a4e4abfc93c7041264b3e62e SHA-256: 5f62ac3859627af37f8463c999d5a6d830c1f207c91a914e36a766b261da8e03
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.cc'. This URL is presented within the document body, likely as a lure for users searching for specific content. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious redirector URL suggests an attempt to lead the user to a harmful site.

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.cc/wix?keyword=shadowrun+3rd+edition+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/e4ff69_088e598ae2b1421086ead9ab2bca99a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a81b69b956e5473c91c32c5a7c31e113.pdf
    • https://static.usrfiles.com/ugd/9e14ca_d83c93c6a2ba432c93a52c60006a3efe.pdf
    • https://static.usrfiles.com/ugd/b8c837_d43729fe8a844fb998c967e8a585d748.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/aparajita_stotram_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/0894/0441/files/problematique_de_la_philosophie_africaine.pdf
    • https://cdn.shopify.com/s/files/1/0440/0683/4334/files/wiwem.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/44729453497.pdf
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/95713531838.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/bufovuweni.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6063/files/gsuite_mx_records.pdf
    • https://cdn.shopify.com/s/files/1/0439/9353/0526/files/bares_da_pisadinha.pdf
    • https://cdn.shopify.com/s/files/1/0454/2958/8124/files/jerujixubazimikabakelan.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3308/files/menerarefozonu.pdf
    • https://static.usrfiles.com/ugd/b11f6d_ffa3c7fcb8554021bad8ee5d17688b82.pdf
    • https://static.usrfiles.com/ugd/e73fea_700952d692574af9b01636465ec950c6.pdf
    • https://static.usrfiles.com/ugd/6f58fb_5ae954656fc14259a1f4184a21ac6c73.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_off0001240f.bin
3dd923d572768886fac9e513a25c9aba28ef18ffc43fb664d249d4bb63f6288b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1240F 5280 bytes
font_01_sfnt_off00013618.bin
513e122e74e622cf1a62fae913723dcc0b2c138723a098011f6d426f0c0030ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13618 11036 bytes

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