Malicious PDF — malware analysis report

Static analysis result for SHA-256 1033a545a392b296…

MALICIOUS

PDF

43.3 KB Created: 2020-08-30 02:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f9fa21dd2aa4eff7497dcde925afb6b SHA-1: f9649463a8d6bcdc21b47c392b1e6b25322f70f5 SHA-256: 1033a545a392b296fdef0d00ad4a96e3fae13eb557feaef63cd3f02f8af1f846
162 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The presence of numerous links, many pointing to Shopify, suggests an attempt to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=sundome+xl48+tanning+bed+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6592/3992/files/80866785123.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/79960045048.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/32977593139.pdf
    • https://cdn.shopify.com/s/files/1/0432/6175/5547/files/python_string_to_float.pdf
    • https://cdn.shopify.com/s/files/1/0432/7155/3188/files/bosch_300_series_dryer_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aae4917859e4932aac2d8b100caaea6.pdf
    • https://static.usrfiles.com/ugd/e1c37d_d9214f1ad4874b489d7c4460e408adb0.pdf
    • https://static.usrfiles.com/ugd/760101_f7c92a5011034f46a626767fb5dd729a.pdf
    • https://static.usrfiles.com/ugd/8cbfce_5abb9e847d2e4252ab81fe4d46a9bd75.pdf
    • https://static.usrfiles.com/ugd/735189_260fd049eabb46f3af0169014d41e5f2.pdf
    • https://static.usrfiles.com/ugd/b4a829_0453676c5aca491ebadf63acbdb621b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_be43e3f1c62e4d03850889c24c0edb5f.pdf
    • https://static.usrfiles.com/ugd/0dd040_bf3e91cf0504448a9bcdf443ec6eea2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a61fc3bb1214983a4047278be7b03db.pdf
    • https://static.usrfiles.com/ugd/b8c837_abba3015d5814c7e86f29f7ef6c715f9.pdf
    • https://static.usrfiles.com/ugd/79e0dc_4104e7de4dc0421cb57517e755c508fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab7b918c0fa84a0a8ba6ecca5dad7653.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_off00005abe.bin
3a1d37a1bad1f32128fd45df37ed4e235c7a4c6324f384293179708f96e449b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABE 4148 bytes
font_01_sfnt_off00006958.bin
f68206044fd79c052505238fbf160ce2d9b1faed207b4867f0f659b19c2f9092		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6958 5464 bytes
font_02_sfnt_off00007be1.bin
6e89091697f4943b4725a28b220c8774bd3a752d8fb3d48c6e18db250c570e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE1 10420 bytes

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