Malicious PDF — malware analysis report

Static analysis result for SHA-256 de389fafeefd632e…

MALICIOUS

PDF

70.2 KB Created: 2020-08-18 16:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0917ffcfd211e143961cb9e5085e5284 SHA-1: 967437c2ce881fb20c05602fe58c576f9bfca89b SHA-256: de389fafeefd632ee3b65769cef6ac4e0b4aaceea959c01d721937e09757f0e6
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=cragheart+play+guide', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'Cragheart play guide'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate malicious destination.

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=cragheart+play+guide
    • http://files.simplytravelplanning.com/uploads/1/3/1/4/131483281/ff491b91f0e.pdf
    • http://lotelubo.2-ept.com/uploads/1/3/1/0/131070305/f226deb54ca5.pdf
    • http://nasizaxas.nationaltire.ca/uploads/1/3/1/6/131636725/furufebifi.pdf
    • http://files.forestviewtahoe.com/uploads/1/3/1/6/131637589/kifet.pdf
    • http://nigezuj.louisawarren.com/uploads/1/3/1/4/131437601/2487162.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/material_para_aprender_a_leer_y_escribir.pdf
    • https://cdn.shopify.com/s/files/1/0430/8379/2533/files/gilizexorasamovadop.pdf
    • https://cdn.shopify.com/s/files/1/0430/0157/7625/files/46050916804.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/98837426039.pdf
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/bains_california_wali_instagram_video.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2065/files/adobe_services_sign_in.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wesani.pdf
    • https://cdn.shopify.com/s/files/1/0437/9725/0205/files/fepiwolavanozo.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_off0000d83a.bin
56717250a5ba88d2c81f2e6fda992f0af9fa357c40b88659efecd5d0ed464fcf
pdf-font-stream PDF embedded font (sfnt) at offset 0xD83A 5048 bytes
font_01_sfnt_off0000e95f.bin
8e37b36c4d0357859c9ca3936eab84573c4f16b5f9db03e8ec54e63450773e47
pdf-font-stream PDF embedded font (sfnt) at offset 0xE95F 10096 bytes