Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11c866323b19bc6…

MALICIOUS

PDF

49.3 KB Created: 2020-08-26 23:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bcb20eb3ff31b9ddb4deb96d11d0c0d SHA-1: 3bc1e9cb10d55c5dec4c8f554d94af1ab2a535db SHA-256: d11c866323b19bc6c7ccba8fabb752b0e4ea244ec2d495113e631e071ad5b845
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicating a link farm. The ML classifier also strongly indicated maliciousness. The embedded links, including the primary redirector URL https://ttraff.cc/pify?keyword=eleanor+of+aquitaine+civ+6+guide, are likely used to lure users to malicious content or download further payloads.

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/pify?keyword=eleanor+of+aquitaine+civ+6+guide
    • http://files.emilynotman.co.uk/uploads/1/3/2/6/132682819/posewinulemevi.pdf
    • http://files.autodogfeeders.com/uploads/1/3/0/7/130738894/jitovurimafina-kifife-mokopegavovefuk.pdf
    • http://bozot.sofiagomezuribe.com/uploads/1/3/1/4/131409090/xefazeza-tenepafena-dimepabanobaki-wewixokota.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/tegodixejolelejagugatujug.pdf
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/xerizopaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/7879/4920/files/haeckel_s_three_kingdom_classification.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/61004358602.pdf
    • https://cdn.shopify.com/s/files/1/0440/8911/4789/files/mean_median_mode_in_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0439/5764/9566/files/29893451279.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevimija.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/android_9._0_root_apk.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/google_sheets_vs_microsoft_excel.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_off00007495.bin
ace4b7c08f5e96044621fc2e195bea6231b820353f7e3c8bca7f21113b2b2846
pdf-font-stream PDF embedded font (sfnt) at offset 0x7495 5308 bytes
font_01_sfnt_off000086af.bin
f605fdde620f8f1a2d62e20c32d91c7f6902f27d6f9a097ea8f02fdf8f01e328
pdf-font-stream PDF embedded font (sfnt) at offset 0x86AF 15752 bytes