Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0320112a5e8a12c…

MALICIOUS

PDF

40.6 KB Created: 2020-08-12 16:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d95927dff9edbee74564ce3de51103f8 SHA-1: 1396c69e08afab3500c35255a577f5be42b3ba3c SHA-256: b0320112a5e8a12c8aa339449f585d0d9b3583b69217bc715544d0f621f18b7c
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains and one critical link to a known malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=adding+and+subtracting+polynomials+matching+activity+pdf, which is likely used to redirect users to further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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/pify?keyword=adding+and+subtracting+polynomials+matching+activity+pdf
    • http://xiworevot.mikeuziel.com/uploads/1/3/1/4/131437812/5693172.pdf
    • http://files.tracyvogtdesigns.com/uploads/1/3/0/7/130739895/1763934.pdf
    • http://rofop.paleodietevolved.com/uploads/1/3/0/8/130874359/zizafekex-timitesewaxu-bisigat-lilomavaxip.pdf
    • http://fowagovu.sleepybrook.com/uploads/1/3/1/4/131406717/zexilixizoputebowi.pdf
    • http://files.kashcraftmsn.com/uploads/1/3/2/6/132681824/liborubovo_zabed_gosekafi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8903/files/git_invalid_active_developer_path.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/peter_atkins.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/tomaravemazinawopijeviri.pdf
    • https://cdn.shopify.com/s/files/1/0430/8838/0061/files/tekanaza.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/37272628450.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/memotod.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/koxorigatan.pdf
    • https://cdn.shopify.com/s/files/1/0432/9078/7996/files/46204199757.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/how_to_read_a_company_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/51926812264.pdf
    • https://cdn.shopify.com/s/files/1/0433/5904/3749/files/tasugititefajasemijenefi.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_off00005f0c.bin
8319a642f3806180f5ecd617255dacc10eef428b6e74d66f93b2333360e9d2b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0C 5860 bytes
font_01_sfnt_off000072d0.bin
66a4b1ea7ef6bcbcf81d9f7bfd0356e2c7149ce162d13e0e01dab58bc0136ff8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D0 10144 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.