Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e7cf92167b7fcb…

MALICIOUS

PDF

65.4 KB Created: 2020-08-20 18:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d767e31fe7dfba253cab4a4d3f6eca1 SHA-1: e5c43ff87571d2de3d9d467bf067843739e01fa7 SHA-256: 65e7cf92167b7fcb814786744a6dda7046c2d8af71a5db314c6553d9191cef16
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be the same as the one identified by the heuristic. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or malware delivery. No scripts were extracted, but the presence of malicious links is a strong indicator of malicious intent.

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/pify?keyword=christopher+reeve+foundation+paralysis+resource+guide
    • http://dagimudap.jadeguasha.shop/uploads/1/3/0/7/130739654/8295508.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8366/9412/files/63733691756.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/metoprolol_davis_drug.pdf
    • https://cdn.shopify.com/s/files/1/0435/3572/8794/files/jovizajiti.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0209/files/56195796185.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/wixeba.pdf
    • https://cdn.shopify.com/s/files/1/0432/6401/6539/files/brain_anatomy_and_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viruxirekosarobavogerij.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/calidad_total_y_productividad.pdf
    • https://cdn.shopify.com/s/files/1/0438/3096/8480/files/burupasogakaxoxuja.pdf
    • https://cdn.shopify.com/s/files/1/0430/4424/1562/files/astana_process.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/extinct_amphibians.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/encyclopedia_of_life_support_systems_eolss.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_off0000c129.bin
d276f9dca7253e0033e02955aab5320d1c5105e30fcc233a6b6dddd065bc4894
pdf-font-stream PDF embedded font (sfnt) at offset 0xC129 5484 bytes
font_01_sfnt_off0000d3dc.bin
f7c90a37d3d9fd7a2edc1b1b48ffa97ba7c720136039664dfd847cc3428a9885
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DC 10700 bytes