Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed3485a7bdb1571…

MALICIOUS

PDF

60.8 KB Created: 2020-08-19 01:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1358d97aa96733b8a610d2eb36510573 SHA-1: 55bde588dc26584db921062f57578baa013bbcff SHA-256: 8ed3485a7bdb15715fdee7d5d053051321dfc72b8de3b3042ccdcb2869d22da1
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains text that appears to be related to 'Marvel heroes omega mac', likely serving as a lure. The presence of numerous embedded links, many pointing to Shopify domains, suggests a link farm or distribution mechanism. The ML classifier 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.com/pify?keyword=marvel+heroes+omega++mac
    • http://jolujo.artworkbyhat.com/uploads/1/3/1/4/131482952/telilu-japopapizikas.pdf
    • http://files.spanishduluth.com/uploads/1/3/0/7/130738812/xivapubeluxuleb.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/janirixerajabisixixufobo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/biotelemetry_healthcare_formerly_cardionet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/15875270105.pdf
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/dozobatome.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/69301565119.pdf
    • https://cdn.shopify.com/s/files/1/0437/6965/9549/files/acs_physical_chemistry_exam.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/xipirulum.pdf
    • https://cdn.shopify.com/s/files/1/0430/2841/4618/files/77433630386.pdf
    • https://cdn.shopify.com/s/files/1/0428/2230/3911/files/xalinemokaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/4398/7361/files/3637557195.pdf
    • https://cdn.shopify.com/s/files/1/0431/0519/0041/files/anydesk_apk_review.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/22293919739.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_off0000a8ab.bin
c13b503539ea51ec2be926b478bb987945abd079e393c8cf931f753c663c33f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AB 5276 bytes
font_01_sfnt_off0000ba8e.bin
cc1a624347d811a0873d9f46584e9c3d9d7aec89bfcb3474336c2ad8e700ae1e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8E 16640 bytes