Malicious PDF — malware analysis report

Static analysis result for SHA-256 678f5582c94b3f75…

MALICIOUS

PDF

51.7 KB Created: 2020-09-17 14:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db196461eb8598ed370a411b6b3960e9 SHA-1: eeeca96ce01812e3312cee23f077c81139fe38e6 SHA-256: 678f5582c94b3f75faa0921e80af18514a3128df0606026cf76593eb824eb898
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is flagged as malicious and leads to a redirector. The document body, though heavily obfuscated, contains text suggesting it is a user manual, a common lure for phishing. The presence of numerous external PDF links further indicates a link farm or redirection strategy. No scripts were extracted, but the overall structure and malicious link suggest a phishing or malware distribution attempt.

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=generac+gp3250+user+manual
    • http://files.sofiasnewyork.com/uploads/1/3/1/8/131856158/lixezixubirelalor.pdf
    • http://files.drjohnnylee.com/uploads/1/3/1/3/131382955/lorevijejozez_nonolewi_fibevejimuve_rutesikorexoto.pdf
    • http://files.aydenbbq.org/uploads/1/3/2/7/132740182/801cfcb56cdf.pdf
    • http://files.leadhillps.com/uploads/1/3/0/8/130874539/pugapakitav_zoloj_deziguwirelul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://aa8a0926-e23e-42e0-9dee-49df6e1056dc.filesusr.com/ugd/067ecb_e67ce1639fc5451fa5cbcb5e004275c8.pdf?index=true
    • https://2fc595df-1745-480a-ba6f-77ac931e530f.filesusr.com/ugd/0ebc1f_9fc7d36e99c44d9f8af8498977632023.pdf?index=true
    • https://6a3e42fa-6a48-4587-9ec3-5bb226060aaf.filesusr.com/ugd/43d598_774b1c8fbd914276a328e2762905ea9f.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/0183/8744/files/7607947038.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/52080294018.pdf
    • https://cdn.shopify.com/s/files/1/0438/2674/1405/files/tefitexisoxepurote.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9839/files/magic_weapon_ds3.pdf
    • https://cdn.shopify.com/s/files/1/0429/4026/8711/files/7356704665.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007108.bin
10d3dc68835d0b9e7fcf59e0f0d8de31f6eca518ae20dffc57e0bfb44432b57d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7108 5848 bytes
font_01_sfnt_off000084e0.bin
9801a83d62e982b9916e4a3c101c2be711ecd39c8d27c9906aedfdc5d97a2880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E0 12428 bytes
font_02_sfnt_off0000acd8.bin
526177ef816c6165251276cba9d37c9cde58c758a098f93fabcc535992017e36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACD8 16172 bytes

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