Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e79dfca4e99a7c…

MALICIOUS

PDF

45.9 KB Created: 2020-07-21 06:43:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80d34697382579e2c769fe4bb991633f SHA-1: ac5c57dcb4e1e40a9f7414fcfca589832845fbe1 SHA-256: 16e79dfca4e99a7cb4c2651b6cc39bd5addb7c1dbca6b7da1462027a0c49fdea
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a forklift manual. The presence of numerous external links, including a link farm, indicates a strong intent to drive traffic to external sites, likely for malicious purposes.

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=hyster%2050%20electric%20forklift%20manual
    • http://files.tiffanijenee.net/uploads/1/3/1/4/131408439/9426112.pdf
    • http://files.wellnessthroughadventure.com/uploads/1/3/2/8/132814306/sogexewetevek.pdf
    • http://files.gwutroubadours.com/uploads/1/3/1/6/131637853/fudegerarubedafedox.pdf
    • http://files.bromfield.org/uploads/1/3/0/7/130739490/tubujojodila_samukuri_xufiwozu.pdf
    • http://files.thebeachhousestyle.com/uploads/1/3/1/1/131164157/xanuwaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/wikivibiwodaxowalek.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0101/files/88872254785.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/155877274.pdf
    • https://gemufirezuta.files.wordpress.com/2020/07/29177657871.pdf
    • https://dijilavuxiji.files.wordpress.com/2020/06/zulel.pdf
    • https://defuxit.files.wordpress.com/2020/06/maviw.pdf
    • https://cdn.shopify.com/s/files/1/0427/4677/3660/files/pepinadovefuregabeguv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/duvob.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/17460569515.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vepotarinaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/57580067193.pdf
    • https://cdn.shopify.com/s/files/1/0433/8037/5710/files/vuseperamabamevekeroleg.pdf
    • https://cdn.shopify.com/s/files/1/0429/3859/7539/files/1542396532.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_off000073d0.bin
16063eeac56f57c41c08b3ebc9f8d99b6d1f4217ddc57e2b617490b1095e060b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D0 5304 bytes
font_01_sfnt_off000085c6.bin
1fb38a0b5b63e5c65eac8f912e17255bdaab689fd9717b41da32390e69cd6a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85C6 11376 bytes

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