Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2482a1173c7a9c…

MALICIOUS

PDF

43.1 KB Created: 2020-08-29 22:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bf42f86434303b906668e88f4d2c681 SHA-1: 07b9088dfabf8365cd5b99eab97e0d287ec604b7 SHA-256: 5a2482a1173c7a9c7a8da1495e36932134b2440dd55925a69043f87d9f0717b5
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=i+can%2527t+make+you+love+me%252Fnick+of+time+piano+sheet+music'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains references to the same URL and other PDF links, suggesting a link farm or redirection tactic. The ML classifier also strongly flagged this PDF as malicious.

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=i+can%2527t+make+you+love+me%252Fnick+of+time+piano+sheet+music
    • https://cdn.shopify.com/s/files/1/0433/8329/2060/files/59948676166.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/pixelmon_beast_ball.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2791/files/94251099379.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/ignou_date_sheet_dec_2019_m._com.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1e65132d22e40e49b5d033b17b4eb19.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf05ce16c7674097a1f1da5467c5178b.pdf
    • https://static.usrfiles.com/ugd/b8c837_179fd8786ac64f2db5de0ab89a31cd27.pdf
    • https://static.usrfiles.com/ugd/b8c837_b34d500d95844267aa7a0fb2f1b9653a.pdf
    • https://static.usrfiles.com/ugd/0c41e7_1de17230ba624c2090e3fa325a7318ee.pdf
    • https://static.usrfiles.com/ugd/3f0e57_99c3c5439c704f1f8a53068bbc519d99.pdf
    • https://static.usrfiles.com/ugd/5926b4_ad93a64f39734acebff1bceeb96a51c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_173c99e94a0640a4accc19156c7143b8.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/silurafidudukokam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/22456169671.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/gutat.pdf
    • https://cdn.shopify.com/s/files/1/0434/2674/2421/files/75904705375.pdf
    • https://cdn.shopify.com/s/files/1/0434/6819/3952/files/javascript_snake_game.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_off000068e5.bin
75926601dd2f1221cf445cebad526e0ec053253cb0e3c0ff1f2b2283bfe4eb55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68E5 5392 bytes
font_01_sfnt_off00007b2d.bin
879f3bb6146a4c8ee3ae87dcc512858f15393c3f281fb0fc54abf0c1cc7e6d4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2D 10380 bytes

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