Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e8011dc083d879…

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 18:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf7911ede3994776edb80a4b2e53195b SHA-1: cf207e6d5d84ee2b99bc88b1121cf8e874b0af71 SHA-256: 75e8011dc083d879a1a449867154b52e1114fd82c702462cc7b55f9c2433dfdf
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.me/wix?keyword=achievement+unlocked+2+guide, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous links and the malicious redirector indicates an attempt to drive traffic to malicious infrastructure, likely for phishing or malware delivery.

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.me/wix?keyword=achievement+unlocked+2+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/application_octet_stream_to.pdf
    • https://cdn.shopify.com/s/files/1/0448/2344/5666/files/understanding_the_linux_kernel_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/materi_vlookup_dan_hlookup.pdf
    • https://cdn.shopify.com/s/files/1/0457/4783/0940/files/13030548876.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2d4489615cd4dc8bba1a7d44a224d1c.pdf
    • https://static.usrfiles.com/ugd/b8c837_844f99191be048459ebf93f46e03fc78.pdf
    • https://static.usrfiles.com/ugd/b8c837_161ab6fb037247e781f9f91ce5671a02.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7c1df167c7144dcb2e091af2a92c45b.pdf
    • https://cdn.shopify.com/s/files/1/0429/0071/7727/files/cancer_gastrico_signos_y_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0451/0554/5369/files/wibud.pdf
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/nts_analytical_reasoning_questions.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wefudebavisizaku.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee9db509fe3b41b8b98ae1688667e26e.pdf
    • https://static.usrfiles.com/ugd/c1108c_cb80de30f2ad4421b2bbc8b44d94c286.pdf
    • https://static.usrfiles.com/ugd/b8c837_8357f9d59c75490ead6d8ee1817ba276.pdf
    • https://static.usrfiles.com/ugd/b8c837_172efa5ee21f4ac49c4e42bfffa82872.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_off00006aa5.bin
e6241901999c75f92a1acc8db5957c822ed13742de633f99ff53e51d616f3aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA5 5112 bytes
font_01_sfnt_off00007bf3.bin
aa5334e683d389f81e40a1d309d2586cb085ec9aeda87fe0f4deec874adeb443		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF3 10600 bytes

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