Malicious PDF — malware analysis report

Static analysis result for SHA-256 0614676f7ac95047…

MALICIOUS

PDF

43.9 KB Created: 2020-08-29 18:40:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c1b337260fb681183d40f531652d5e6 SHA-1: ccad9519e0f9c79d6038ab69f124964b28bf7842 SHA-256: 0614676f7ac9504747ee7838c1800d5f8e369eb8075d94858718c8da2b14c5a7
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, but one critical link redirects to a known malicious domain (ttraff.com). The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content. No scripts were extracted, but the PDF structure itself facilitates the attack.

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.com/wix?keyword=%25C3%25A9valuation+familles+de+mots+ce1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0820/4706/files/24306602953.pdf
    • https://cdn.shopify.com/s/files/1/0431/5004/9448/files/lazegoxapupanokara.pdf
    • https://cdn.shopify.com/s/files/1/0430/8313/7178/files/polycab_pvc_cable_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8501/files/3129642145.pdf
    • https://cdn.shopify.com/s/files/1/0438/1406/0189/files/8563326083.pdf
    • https://cdn.shopify.com/s/files/1/0437/4052/8792/files/remipewi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/1122213681.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/59502700301.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/50050921294.pdf
    • https://cdn.shopify.com/s/files/1/0465/0552/5398/files/bhoomi_movie_songs_video.pdf
    • https://cdn.shopify.com/s/files/1/0441/0192/7064/files/mec_reloaders_parts.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdf
    • https://static.usrfiles.com/ugd/b8c837_a780ce450f614092ad228dac8e8e6997.pdf
    • https://static.usrfiles.com/ugd/b8c837_a47a680e4ec94322a405f54667ff81ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_5fd98ab8379b47ddb5271056b0ae102f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2fbf2502bc746fe86a3c4dec6c5054f.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_off00005c43.bin
68c302b9ba3fc15795a1b4a6c8f80f808fbe7a4a064d31abb21ca5828c2afa28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C43 5044 bytes
font_01_sfnt_off00006d65.bin
c4221811caa4971f66df4fd4474689302cae228a5930d8ec770505df70b000b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D65 11780 bytes
font_02_sfnt_off000092a6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92A6 4324 bytes

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