Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a1a4f1f2a09470…

MALICIOUS

PDF

49.1 KB Created: 2020-07-17 19:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f804400f00b94d50e20c641ed42ed248 SHA-1: 112ad45ce3c002d905ffa0ed7536cd1d69db0372 SHA-256: 65a1a4f1f2a09470033f7c60e5d1ee3e9eb99314dc61c17dab35eabd6cac2d44
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, suggests a lure related to a car manual, aligning with common phishing tactics. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm used for SEO manipulation or distributing further malicious content.

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.com/wb?keyword=2011%20volkswagen%20cc%20manual%20transmission
    • http://files.zulal.org/uploads/1/3/1/4/131453206/jufot.pdf
    • http://files.craftyladycrushingcancer.com/uploads/1/3/1/3/131383426/vesosuzuxoje_lonukopivux_jozavakikavid.pdf
    • http://files.kocanada-usa.com/uploads/1/3/1/4/131437538/zorodoke.pdf
    • http://files.kohlgallery.org/uploads/1/3/0/9/130969735/5e627852.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/55009584223.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81274949660.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/32298988243.pdf
    • https://cdn.shopify.com/s/files/1/0428/3911/3895/files/16272851415.pdf
    • https://ginawuxeniza.files.wordpress.com/2020/07/difuvizenunuzores.pdf
    • https://vemupuki.files.wordpress.com/2020/07/67421345179.pdf
    • https://bubusajofugi.files.wordpress.com/2020/07/30454197050.pdf
    • https://cdn.shopify.com/s/files/1/0435/0479/5800/files/76386037323.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29318048561.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/xexodozomenebuxojuliviti.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/54819550278.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2712/files/43136229329.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wupukibasabozuxijixosi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6620/4066/files/dubewutezirinu.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_off000081e9.bin
82c04c700179600bbac5eae8c89966f3a05780969774084b2c0601315e5e682a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E9 5448 bytes
font_01_sfnt_off0000946d.bin
fe06d977bf7d041e9fb5461afc43ad3384e1058a216e40e24328e29e9c2db866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x946D 10052 bytes

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