Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6f70b3d6681388…

MALICIOUS

PDF

33.0 KB Created: 2020-09-08 14:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 239f2c10767b9b60c48ca20b2bcd63e5 SHA-1: 4586138f14f4ec973cec7a3377e90339d10a1c45 SHA-256: 8e6f70b3d6681388337f0da64f50caa2cf053b38027f4f498dcfebdb313b4be6
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.me/wix?keyword=amoeba+sisters+video+recap+answers+natural+selection'. The document body, though heavily obfuscated, contains this same URL, indicating a lure to a potentially harmful site. The presence of numerous other PDF links suggests a broad SEO poisoning or link farm strategy.

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.me/wix?keyword=amoeba+sisters+video+recap+answers+natural+selection
    • https://cdn.shopify.com/s/files/1/0430/1350/5185/files/sabobawalagoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/3100/1250/files/10982402689.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/walmart_employee_handbook.pdf
    • https://static.usrfiles.com/ugd/64d889_2691295b80f14ed9a0ce2524be1753a6.pdf
    • https://static.usrfiles.com/ugd/fb5067_bf7225a283794d44937505bca7734e81.pdf
    • https://static.usrfiles.com/ugd/9bd8c3_a912d9c83a55475ebf9382796b7a7959.pdf
    • https://static.usrfiles.com/ugd/e8dba5_0d364b70635841feb382de3700e3ca64.pdf
    • https://static.usrfiles.com/ugd/1be480_3c4598c379ed475e884b932d02d4154a.pdf
    • https://static.usrfiles.com/ugd/db93e9_491142241882457888c3a5a3239c06a9.pdf
    • https://static.usrfiles.com/ugd/930050_858a60a28288408b9f5e0d1e986214ae.pdf
    • https://static.usrfiles.com/ugd/10b11f_da91d4b61f6645d991d45884d7b5cfdc.pdf
    • https://static.usrfiles.com/ugd/3ed902_470d9769345c4b20a72549d95e456c1d.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_off0000442e.bin
e1bf3e806099061ff84a83df5e81b18424ca837809ed31e8f869b3e326830e3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x442E 5500 bytes
font_01_sfnt_off000056da.bin
39fd71cf75991d2ded5c3e6d2ce234ef34154bc5cf814cd8c00114333f1c0c95
pdf-font-stream PDF embedded font (sfnt) at offset 0x56DA 9404 bytes