Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0a2b87072f5d4a…

MALICIOUS

PDF

45.4 KB Created: 2020-08-31 12:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 045de8e12132f085e92ac674bb88022a SHA-1: ca0d7df56a44ee7be7716b7f649e24ef39d49f39 SHA-256: 0f0a2b87072f5d4a62eefa7ef0ff2c74dc34abe324b7421056a94adae45510c6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Chip genius 2017 free download' and the malicious URL, suggesting a lure for users seeking software. The presence of a malicious redirector and a link farm indicates an attempt to drive traffic to potentially harmful sites.

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.club/wix?keyword=chip+genius+2017+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/4cf28d_585344d8914c48798a3d5d87cc5517d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf8204b084274036b0933a571710e5af.pdf
    • https://static.usrfiles.com/ugd/b8c837_15e2403becef4676ae52a0c0f743d93c.pdf
    • https://static.usrfiles.com/ugd/353d00_fd90edf3f5b04ab696f3da7bb8e5eaf2.pdf
    • https://static.usrfiles.com/ugd/3b7182_bd7a9d0164ef4366a4abfde0ece71073.pdf
    • https://cdn.shopify.com/s/files/1/0438/0177/2192/files/25545249172.pdf
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/keruwixik.pdf
    • https://cdn.shopify.com/s/files/1/0437/8394/6397/files/karofonarebixopakopuwun.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/jibabejolerazanigamiwoseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/rukotajalezix.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/half_moon_bay_jetty_surf_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0450/2441/1806/files/respiratory_system_diagram_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0787/files/81256744524.pdf
    • https://cdn.shopify.com/s/files/1/0432/4576/4770/files/gimojuvifi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1038/files/sabex.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/pedoloziborepovaxas.pdf
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/57906524329.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_off000067b2.bin
c565813359bf6a2694aea63f5a473bf9c50149409f159854a4c40c107b2c716a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B2 5704 bytes
font_01_sfnt_off00007b42.bin
97881fe72f988cec8fe2f982e23f1a23e2d7a1e5eccfe898dea82e9920ea2b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B42 14724 bytes

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