Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c057fbe093c0f71…

MALICIOUS

PDF

41.9 KB Created: 2020-08-31 15:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1392430171f67687181c5b89e8ea845 SHA-1: 83801701ba1d36547702517e9b6e32dac0318eaa SHA-256: 5c057fbe093c0f71a421768fedae4bcaaafb300d24561efabacf78157043a985
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to known malicious redirector infrastructure at 'https://ttraff.cc/wix'. The document body and heuristics suggest a lure related to syncing issues, likely to trick users into clicking the malicious link. The presence of multiple PDF links, some pointing to Shopify, indicates a link farm strategy. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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=outlook+calendar+not+syncing+properly+on+android
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/4445/2005/files/80474317547.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/merojar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/zebugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/applied_fourier_analysis_hsu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6726/files/learn_american_english_online.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d2de1530d9a40f7a8d9d9c9c6652491.pdf
    • https://static.usrfiles.com/ugd/0df15e_c37e84c01ac641e596dd756bedec7f18.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2cb3a4d89764a438a4b9782b91d9e0d.pdf
    • https://static.usrfiles.com/ugd/822ecd_34f4824195a948f2b59f7e27c825e1de.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_9a6a26fb89a6410f90ee9ed05e2f6d4c.pdf
    • https://static.usrfiles.com/ugd/b8c837_8b3bd44c3eb94a4f8ee3af58f267030a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c62f1cc3a86943bf900ec6bbd8948d6e.pdf
    • https://static.usrfiles.com/ugd/0adedf_029994a5cb15436bbd45e5e5bd450118.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_off00006525.bin
2d6a5f6f44989e688054bf5713fed0ba887cae0bf7190d246be9d50f57e39cd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6525 5436 bytes
font_01_sfnt_off000077b8.bin
67bf3ff94aa319e8c084f53084568ea935cd88f7d640bd3664a3c034cdf65e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B8 10148 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.