Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b5bafdf2a7798b…

MALICIOUS

PDF

40.1 KB Created: 2020-08-30 06:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac17eec1d6665220c4f90c1ea518740c SHA-1: 7e9dedacc8868e5e2ad7aa39f24fd7e0370fd3d1 SHA-256: 09b5bafdf2a7798ba918179f2ab3ae0647eddd3aaffc9ddd0e9f7364c79f6d61
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify. One of the primary links directs to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

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.cc/wix?keyword=lg+55lf6000+review+cnet
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/levagej.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/zivagirijefodolemuzar.pdf
    • https://cdn.shopify.com/s/files/1/0445/4517/9807/files/app_store_iphone_7_plus.pdf
    • https://static.usrfiles.com/ugd/c068f8_d7520036d22748c285dd84bc6737964e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a15df89d11d04cac9da1fcf2f28cd735.pdf
    • https://cdn.shopify.com/s/files/1/0431/4012/0733/files/48819416136.pdf
    • https://cdn.shopify.com/s/files/1/0438/0029/7633/files/muvelexekademaxeribizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/gaming_logo_psd_templates.pdf
    • https://cdn.shopify.com/s/files/1/0437/6897/1418/files/charisma_microfiber_sheets_reviews.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5497/files/85741052703.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/5839327844.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_off000055c6.bin
472e48dfe45547ad9075d7eedf343ee0699a48c4afdeeb2c2040fdd4a24fb285
pdf-font-stream PDF embedded font (sfnt) at offset 0x55C6 5176 bytes
font_01_sfnt_off00006791.bin
b77114e8bf2ec919708a304fb8563b08f5337296245967e42268d6340bca2556
pdf-font-stream PDF embedded font (sfnt) at offset 0x6791 14448 bytes