Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aaf8b3853ba7946…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 16:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3265987937c2e12e90411c1adb460d5 SHA-1: 7c72a8089173ab962ad878ab921582a8eb4c8752 SHA-256: 6aaf8b3853ba7946fd8c6eb5e1786292098260c7d356a34a65db7c733c7b3198
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by an ML classifier and contains a significant number of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=law+abiding+citizen+streaming', suggesting a lure related to streaming content to entice users to click on malicious links. The presence of numerous PDF links indicates a link farm strategy, likely for SEO poisoning or distributing further 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.cc/wix?keyword=law+abiding+citizen+streaming
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d1d005_e77389068c61443ab01c1a3c9d8274e5.pdf
    • https://static.usrfiles.com/ugd/455f95_780d52a0e27c4041aba20e50b2cea09d.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b501853060a42d7b78d1b69e0aee4bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_caaba8d62c9f49278d45ca32e7757fe3.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1245/files/koxiv.pdf
    • https://cdn.shopify.com/s/files/1/0459/8978/9853/files/wofosuvijifin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/agyo_privacy.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/malaysia_horse_racing_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1665/files/98245410651.pdf
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/descargar_pin_para_blackberry.pdf
    • https://static.usrfiles.com/ugd/5de1df_a12ff2ad274c46f8834a764bd7c89e16.pdf
    • https://static.usrfiles.com/ugd/b8c837_c70b9d4424d8405bb3bda691be94c03d.pdf
    • https://static.usrfiles.com/ugd/b8c837_22f20fd1762a4057ae04fd19e1d84c00.pdf
    • https://static.usrfiles.com/ugd/b8c837_e140007085bc436899dd611ba47cae93.pdf
    • https://static.usrfiles.com/ugd/122077_414116daa651453296e5f531ad96a3f0.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_off000055f1.bin
0c7d0691fa9c4ecc066f3d1b04da2bec2bd5ac221bb8cd0ad40f6a726a75ffef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55F1 5452 bytes
font_01_sfnt_off0000687b.bin
fba00a89e6465eb51288c8a82fd4a09320a60c220a7974001d57465280612e70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x687B 10568 bytes

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