Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b8aabceea400fd…

MALICIOUS

PDF

42.4 KB Created: 2020-09-02 02:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13338cdd895f192720fd8b25bdb047a8 SHA-1: df36e8a1048b7370b8f37d33c72c7f704635a3e2 SHA-256: 67b8aabceea400fdaabe9ac67755b3126ea34b728f000b828ef09f22000b779a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=cmp+jacket+size+guide'. This URL is likely used to redirect users to malicious content or phishing pages. The PDF also contains a large number of external links, suggesting a link farm or SEO abuse tactic. While no scripts were extracted, the presence of a malicious redirector and the ML classifier's high confidence indicate a malicious intent, likely to lure users into clicking through to a compromised site.

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=cmp+jacket+size+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_012eaa64d26d44bcacde788e94d234b1.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_b6481fbc8f3745d69e73cecaaceabf77.pdf
    • https://static.usrfiles.com/ugd/fdee49_be6a3a0aab8c43028b3fbcbd0c0c59c2.pdf
    • https://static.usrfiles.com/ugd/735189_0670ed1d528647759e179b51deca0835.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7576/files/xivaregikavumomeni.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/21025242129.pdf
    • https://static.usrfiles.com/ugd/b8c837_8892ecd23144482e8596fe79f68ec74a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9842a2897bf4bdc9bb74fe7f8ce7dda.pdf
    • https://static.usrfiles.com/ugd/0e6328_fdf63d342fea4c449d16a9ba10e486d4.pdf
    • https://static.usrfiles.com/ugd/81ef4b_2ac038a8257b4aaa9dcf284aeb6ebebb.pdf
    • https://static.usrfiles.com/ugd/b8c837_d48471aaaa244e38b35b19d5a8e26b74.pdf
    • https://static.usrfiles.com/ugd/9374a7_3e42257fceb24daeb34e2b3e425c63dc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b11.bin
f20ddb5620b2b65990c17264b5c01a8bcc0a438c53cfc3dcb6792af0ae3b5d01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B11 5144 bytes
font_01_sfnt_off00006cac.bin
9bb7c970150f32a3978d28ebb09a3285d51504a2adb974c289dd9fcb8e195830		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 10044 bytes
font_02_sfnt_off00008eff.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFF 4324 bytes

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