Malicious PDF — malware analysis report

Static analysis result for SHA-256 630341fb5f5b6a9b…

MALICIOUS

PDF

43.1 KB Created: 2020-09-06 13:26:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e3569c1a2d6bf34e1cbdadf35df33f9 SHA-1: ed1e7407ee7191c427b8ee26a7f14ca26e064007 SHA-256: 630341fb5f5b6a9bea93b3f7d416e3af9ba181509ce0e4e9ede7e4ae53b9c7e2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to a link farm infrastructure. One prominent link, 'https://ttraff.club/pify?keyword=excel+bedingte+formatierung+text+enth%25C3%25A4lt+nicht', is identified as a malicious redirector. This suggests the document is designed to direct users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links and the ML classification strongly indicate malicious intent.

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/pify?keyword=excel+bedingte+formatierung+text+enth%25C3%25A4lt+nicht
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/6f58fb_68c4629de9084f16bb7b42b48f05f645.pdf
    • https://static.usrfiles.com/ugd/73cb9e_a5698a77c8434006ba3a45dfec37d9a9.pdf
    • https://static.usrfiles.com/ugd/4cf28d_606bbdec735543819c74c04ac44aeda9.pdf
    • https://static.usrfiles.com/ugd/04e6f9_75a255edbea04de69faecbcb3f11024e.pdf
    • https://static.usrfiles.com/ugd/1e533a_b6af273774674b9a86b64e67d001faea.pdf
    • https://static.usrfiles.com/ugd/0cd019_0f5ac8625769439093082ea141cb2341.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_a54f3682611846b690c3805cdef64ce4.pdf
    • https://static.usrfiles.com/ugd/89363e_7e33c42197a047a0b132430bb12171af.pdf
    • https://static.usrfiles.com/ugd/70094d_8e3569d4a33641b1b3672a3081a6c886.pdf
    • https://static.usrfiles.com/ugd/ba3095_ff6f28a01bea472581373fd00cfdd668.pdf
    • https://static.usrfiles.com/ugd/9b5f63_317e9a0dacc344dfb57ea8ea643f4942.pdf
    • https://static.usrfiles.com/ugd/a7074a_ad4fee196ca14cc3a7422984497ab153.pdf
    • https://static.usrfiles.com/ugd/866690_64dd267843564fa68103a0598f93c023.pdf
    • https://static.usrfiles.com/ugd/20d83a_f34513f641494711996763f2af9a459b.pdf
    • https://static.usrfiles.com/ugd/d5cf39_e400b613cc8345408fc334af876964b9.pdf
    • https://static.usrfiles.com/ugd/105a8c_b2b83be4274b4e37b0860402c2e3673b.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_off0000641a.bin
06d88081703459ce915492c02823b775153a786c021be69a871f0553642ddc70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x641A 5660 bytes
font_01_sfnt_off000076a9.bin
6bc3d32bb7d93197b37f07def54ad9c0f5b4c09ed07c117ed970b77863a1b7a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A9 11624 bytes

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