Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aea8bca6a904dc0…

MALICIOUS

PDF

50.7 KB Created: 2020-09-02 22:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aa76703dde559ea2fc2f7db9d295a27 SHA-1: 25c26aca60cb368697fbd7a259b491b99dda6680 SHA-256: 2aea8bca6a904dc00cc328752cf2f13b8482620d5f42703bd63d5a33be166903
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous links, a significant portion of which point to a redirector service. The primary malicious URL, 'https://ttraff.link/wix?keyword=chamonix+weather+snow+report', is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to PDF files hosted on static.usrfiles.com, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious.

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.link/wix?keyword=chamonix+weather+snow+report
    • https://static.usrfiles.com/ugd/314c35_e0089e9e5c7f43ed8bf83ca03a3708fc.pdf
    • https://static.usrfiles.com/ugd/0a593f_f7fcfd338ece490387196de5efc1accb.pdf
    • https://static.usrfiles.com/ugd/69b86f_c1f64770681148c181c00563fa0e4137.pdf
    • https://static.usrfiles.com/ugd/ae059d_ffd1beb135f541c99275c24870f44cf1.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_363e06a14f8845f28ab09deca7d134c9.pdf
    • https://static.usrfiles.com/ugd/5af86b_e6047b23abb743a3ae696c60ad5113d4.pdf
    • https://static.usrfiles.com/ugd/952c2e_e8ff4065ede4491ca500d614f1509db6.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b14eb682f704021adc5dfbf9910e8c5.pdf
    • https://static.usrfiles.com/ugd/c75f60_dfc4081f1d6b4565aec78d7b84d8270c.pdf
    • https://cdn.shopify.com/s/files/1/0432/2911/8627/files/vizoxepotunefuwugaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/66233977731.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/when_will_auchi_polytechnic_form_expire.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30347825404.pdf
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/54387634968.pdf
    • https://cdn.shopify.com/s/files/1/0430/0747/5875/files/pititak.pdf
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/97052895765.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/wewulivowamebujuw.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e9a.bin
e6f2f0f6f5f0a3a8b338e9abb8ddffdd09832aca3be6a5d98431e3545d53314a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 5092 bytes
font_01_sfnt_off00007fca.bin
59bcc3739add8d17cd4b382abcd66daa0796b2fe6f61e43be364704957925251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FCA 12188 bytes
font_02_sfnt_off0000a7d0.bin
6c189d4489f2da8eff8d88bb6a773ee0cab47aa83d9cd39d0a47a3b398abec95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D0 16176 bytes

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