Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c6ccfe86ee31bc7…

MALICIOUS

PDF

54.5 KB Created: 2020-08-29 21:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c5538ef6b46cca2b7e372a42228fe8c SHA-1: 02ffcdc1d28e7c018786d5e3eda2fde8cb19c7f1 SHA-256: 5c6ccfe86ee31bc7624fc421932f8f93a81bce10641150263e515c8ad7656e71
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs and document body text that mimics a security alert, directing the user to a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the primary URL. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, likely for SEO manipulation or to host 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=unregistered+vcs+root+detected+intel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0378/8959/files/rudidikituxafogoxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/pokizivipememerominafe.pdf
    • https://cdn.shopify.com/s/files/1/0443/0928/2972/files/interview_questions_and_answers_in_english_for_experienced_candidates.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/29187582709.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/60052585917.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65294746239.pdf
    • https://cdn.shopify.com/s/files/1/0437/3171/4199/files/naduzavixufevavujadawuda.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f85eb8b251245289cfa47208ffe1073.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0183fa233b04eaba1a5c57c03c6be3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_34b899ffa7ce4a47b708cf60390c11b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_1419705ab4874e0bac4a3c4176785338.pdf
    • https://static.usrfiles.com/ugd/b8c837_292b33e770de484aaf91ce4a74933f5e.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/21194490057.pdf
    • https://cdn.shopify.com/s/files/1/0437/5370/1525/files/21946519334.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000685e.bin
4e0eb092a3ab47cbac800ef89f6bd21be4cc78440ba3bfb6f49022a08fbd17e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685E 4736 bytes
font_01_sfnt_off00007886.bin
735a0aee8cafea75fe0c69ea451b5aa95aa7717460a82879c8635cbf11fe4623		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7886 15144 bytes
font_02_sfnt_off0000a7fb.bin
52db30b66cfb76898988bc7c6ed152514c301740808ab95bec9c68e49df23550		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FB 16036 bytes
font_03_sfnt_off0000bc63.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC63 4324 bytes

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