Malicious PDF — malware analysis report

Static analysis result for SHA-256 165957d1d48e1fff…

MALICIOUS

PDF

41.1 KB Created: 2020-09-08 17:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 242505bb9f83f1893d57eb6d5d842c4e SHA-1: d56beb8d77309db454794726c7b043a83b85f2f4 SHA-256: 165957d1d48e1fff59c031d2cd1812674e0b972da9bd06807a14b8c97db685a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, disguised with a keyword related to popular games. This indicates an attempt to lure users to a malicious site, likely for further exploitation or credential harvesting. The PDF also contains a large number of external links, suggesting a link farm or SEO manipulation tactic to distribute malicious content.

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=android+games+live+gta+5
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/111c46_c1c74e5eab444ae5b9991aacf08eae77.pdf
    • https://static.usrfiles.com/ugd/e3834b_4c160dd415b64e44b234b687ec9dd987.pdf
    • https://static.usrfiles.com/ugd/13ae68_54276acb6b6c41e198be42d730d4e6e2.pdf
    • https://static.usrfiles.com/ugd/74c34a_881455f633df43c8ac6bb896e0aea480.pdf
    • https://static.usrfiles.com/ugd/808d8c_a722a1330f724f0289d3dfc3893993ed.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_a68a35c0d1ff4ce5888116bd248af24d.pdf
    • https://cdn.shopify.com/s/files/1/0431/5280/1943/files/xutonimetezetu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4104/4118/files/14448184400.pdf
    • https://cdn.shopify.com/s/files/1/0437/1765/6728/files/rawatuwudivedogof.pdf
    • https://static.usrfiles.com/ugd/0f9ef0_d27c266c58a14d9b81de123287bafd64.pdf
    • https://static.usrfiles.com/ugd/4cd51e_1c6ba7d7f52c47db9fa2537131aeb4cf.pdf
    • https://static.usrfiles.com/ugd/338562_9457af6118bb4210b931dc0badb93f81.pdf
    • https://static.usrfiles.com/ugd/760101_1c7098697cba4eed8b8544647409f203.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_off000062e2.bin
a5106add8e615b61575a5e0c000cb334166d75f96e9e3465121f11481e416c56
pdf-font-stream PDF embedded font (sfnt) at offset 0x62E2 5316 bytes
font_01_sfnt_off000074ee.bin
4746f16887f5a07546e5f79a994ea8673b8088a85ea5469c7655757b8bb69f5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x74EE 10424 bytes