Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11c8a7cd4d7b9d5…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 22:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d238b5d4b74a0061a5c582049ec3b755 SHA-1: 239b178b9d1318d87c9feb04239dd33931453cf2 SHA-256: f11c8a7cd4d7b9d5f2b3d0e48cb63425181a64b6df68902c8006accd39c5efdd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link pointing to `https://ttraff.ru/pify?keyword=ironman+florida+2019+race+report`. This indicates a phishing or redirection attempt, likely to deliver a secondary payload or lead the user to a malicious site. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=ironman+florida+2019+race+report
    • http://files.soumyaarts.com/uploads/1/3/0/8/130814169/memazaravuneponakep.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/92150406500.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/ruvof.pdf
    • https://cdn.shopify.com/s/files/1/0450/8617/9480/files/sigmoid_activation_function_in_neural_network.pdf
    • https://cdn.shopify.com/s/files/1/0428/9419/6902/files/cinema_box_apk_latest_version.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/noxuromimafofudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/78039430994.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/dupaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1821/files/gukewatirabomisaso.pdf
    • https://cdn.shopify.com/s/files/1/0431/4782/1205/files/xaraw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7510/9018/files/lawemolijuroborato.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/sepse_neonatal_tardia.pdf
    • https://cdn.shopify.com/s/files/1/0429/9096/0799/files/difikonagawafamomibarel.pdf
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/here_again_elevation_worship_chords.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_off00006b92.bin
f579091d43b02343ae55b1429489b366e7b253bdaf57484dbe43b10be57e5ab2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B92 5544 bytes
font_01_sfnt_off00007e49.bin
67b3080526c6b61ef2af4ff0dbd4fae0a66ac427e2336fca934a052e6ec7d741
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E49 10072 bytes