Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e0348985eff38c…

MALICIOUS

PDF

72.8 KB Created: 2020-08-17 09:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 95cd2dde9bfaa09d9ca4e62c13fdf339 SHA-1: 03b6c3755d53f38284b4399ea5991e4865857d2b SHA-256: 65e0348985eff38c2ae3a7d63d03dc2b364a2c515057a7cddc4f2778bf003ca2
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 the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify-hosted PDFs.

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=yo+kai+watch+2+post+game+guide
    • http://fepilu.aprilnieves.com/uploads/1/3/0/7/130740596/4450756.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/lepipumujotasored.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/21308820021.pdf
    • https://cdn.shopify.com/s/files/1/0430/9889/8592/files/soxejoxivugipu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/52817474160.pdf
    • https://cdn.shopify.com/s/files/1/0433/2791/4139/files/blood_pressure_monitor_cvs.pdf
    • https://cdn.shopify.com/s/files/1/0429/2499/8819/files/13950338349.pdf
    • https://cdn.shopify.com/s/files/1/0432/0270/7616/files/tewurisovigigegufusuwukor.pdf
    • https://cdn.shopify.com/s/files/1/0432/2413/7890/files/32809180339.pdf
    • https://cdn.shopify.com/s/files/1/0434/3119/8886/files/potezufonetiguzijeze.pdf
    • https://cdn.shopify.com/s/files/1/0431/9186/1410/files/bufar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/33010614988.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3475/files/beginner_diagnostic_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4496/files/dasijamotarugabizofoti.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8f7.bin
bd6f35807b249a77dfa2c6080f684f000a3a8f34dd63c3b453e2d2cfab8aef54
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F7 7780 bytes
font_01_sfnt_off0000d3ca.bin
61a7ab5ab01bf1e45a5ce21fc4047d45ce996348350fb969d3d1ef72aef6ce5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CA 5608 bytes
font_02_sfnt_off0000e6d1.bin
45cd1afff758343d2013bd7b808fe5a1005f8e6a3a5c31cd25f6d3a0e097708d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D1 15188 bytes