Malicious PDF — malware analysis report

Static analysis result for SHA-256 5717c7087526cd43…

MALICIOUS

PDF

34.4 KB Created: 2020-08-29 23:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 394621c89b1b74abfef972d2a4062bb5 SHA-1: f74c3431f2d835662bdf609d75d60fe00c77f28b SHA-256: 5717c7087526cd43d44e2f475952ee3fded9a83ccc8d7c1c5132bace80a23c2a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify and static hosting services, forming a link farm. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure via the URL https://ttraff.ru/wix?keyword=owlboy+walkthrough+dreadnought. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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.ru/wix?keyword=owlboy+walkthrough+dreadnought
    • https://cdn.shopify.com/s/files/1/0432/6588/4323/files/75009960683.pdf
    • https://cdn.shopify.com/s/files/1/0429/1208/8231/files/23731682258.pdf
    • https://cdn.shopify.com/s/files/1/0432/9242/6405/files/verilubagekovetamine.pdf
    • https://cdn.shopify.com/s/files/1/0444/0725/9302/files/journal_anemia.pdf
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/legodipurosekune.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/73068788715.pdf
    • https://static.usrfiles.com/ugd/b8c837_9457d1d0d431470e8844057789c5ded9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9697dd7740e74475badebf05d2c73e82.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e0ac82fcabc4627b16f20c7458909b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c79d1e4fec24a21b436b33c2cb6f765.pdf
    • https://static.usrfiles.com/ugd/b8c837_a0ca406fdb284c93b800e0156dfe8b64.pdf
    • https://static.usrfiles.com/ugd/d775a9_5d77e75e55a84cefa277ab9e3e9cc0ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb823b2bf3bf42fab79ae2377cbac88d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004915.bin
240ecbf03a7a8a123c79fa6f6fd8923d1a9d2c74227d39acc7156935420c0cc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4915 5336 bytes
font_01_sfnt_off00005b3d.bin
23fc629837e76b76310832f0829614ce2c5dc56c772cf6575b595b1265d84cdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3D 9932 bytes