Malicious PDF — malware analysis report

Static analysis result for SHA-256 39dbca12913a325b…

MALICIOUS

PDF

44.4 KB Created: 2020-09-07 02:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2972547f10cec1ef4464fe8cd172d473 SHA-1: 38905758559d1486de54ab895eec3c487ae91ecc SHA-256: 39dbca12913a325b6944d0fadcb879bb473ed205acf75056603c9e8914f2c86d
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which points to 'https://ttraff.link/wix?keyword=tv+guide+usa+new+york'. This suggests the document's primary purpose is to lure users to a malicious site. The file also exhibits characteristics of a link farm, with numerous embedded URLs, further supporting the malicious intent. While no scripts were extracted, the presence of a malicious redirector is a strong indicator of a phishing or malware delivery attempt.

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.link/wix?keyword=tv+guide+usa+new+york
    • https://static.usrfiles.com/ugd/7a7fb1_69707f7b7eb346c6bb58631642348ec6.pdf
    • https://static.usrfiles.com/ugd/10e3af_01fda7c69f284e68b665523262231bcb.pdf
    • https://static.usrfiles.com/ugd/87fdc7_9ddbfca1cc08497e82d9eafea306a490.pdf
    • https://static.usrfiles.com/ugd/e8e253_f6a20cec7462431bac0ef0e6f0814dea.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/zoluxuwirigaruninurulelu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6542/6598/files/tumor_solido_pseudopapilar_de_pancreas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1754/files/partnership_buyout_agreement.pdf
    • https://static.usrfiles.com/ugd/b1b3ad_22a4903dcb664a85ab0d487ce9f48fd2.pdf
    • https://static.usrfiles.com/ugd/f84671_4117c1c08e2744d9b2dc2f55e6088305.pdf
    • https://static.usrfiles.com/ugd/c1de29_c83e0c21fc194f87815bd90b5dcdbd7e.pdf
    • https://static.usrfiles.com/ugd/b41a9a_f0db953733a6426d8503e3f51fecf647.pdf
    • https://static.usrfiles.com/ugd/5a1791_3d2c1e5acc504928b5208c8a4754481c.pdf
    • https://static.usrfiles.com/ugd/0c60a0_a7198fc2277d453da1bc11a675a24337.pdf
    • https://static.usrfiles.com/ugd/a4d998_ea96dd837716435e9c7a60701fccfc14.pdf
    • https://static.usrfiles.com/ugd/65b209_cc4ee0475741404e98c5d6fd5da7434b.pdf
    • https://static.usrfiles.com/ugd/296484_c79a35471ce54978852dbfc43d8aa163.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_off00006e10.bin
f0334f13916c6c94801186401fe04f258f618dc8613cf00e9769ab2965c549c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E10 5228 bytes
font_01_sfnt_off00008009.bin
7d01b77bc7d32c5a7510ebf2e4ed352e3d066219ae07cde63e50606bf6ccf769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8009 10880 bytes

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