Malicious PDF — malware analysis report

Static analysis result for SHA-256 5996d052ae49ef65…

MALICIOUS

PDF

43.4 KB Created: 2020-08-31 18:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce63d1a14f6ce32c6c7c0cd5f6ae65fb SHA-1: ea9edf0a4f61d392b423e50fae5d0399661c17b8 SHA-256: 5996d052ae49ef656d1b1575741bbfdca7545aadd2aecba2e4d20eefbfd658df
152 Risk Score

Malware Insights

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

This PDF document contains a mass of external links, including a critical link to a known malicious redirector at `https://ttraff.cc/wix?keyword=bleach+brave+souls+hack+orbs+apk`. The document body, though partially corrupted, also contains this URL, suggesting the primary purpose is to lure users to this malicious site, likely for further exploitation or malware delivery. 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.cc/wix?keyword=bleach+brave+souls+hack+orbs+apk
    • https://cdn.shopify.com/s/files/1/0430/7409/3217/files/81880117663.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3934/files/32423504286.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/15138334831.pdf
    • https://static.usrfiles.com/ugd/8cbfce_57cd885bfa434e9daadc64bce89e0a6a.pdf
    • https://static.usrfiles.com/ugd/b8c837_f26783c5898343659938d719a5737507.pdf
    • https://static.usrfiles.com/ugd/fb5067_1717fb1ed39148ed83cba4743d3bb83e.pdf
    • https://static.usrfiles.com/ugd/c75f60_a7bba16f39fa429b9e6554a0ace4615c.pdf
    • https://static.usrfiles.com/ugd/0aab01_f2559c18560d4334b5ed6efdea2188ce.pdf
    • https://static.usrfiles.com/ugd/daca0d_69ee1db54d1f4d5487e21324e12d400e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2fb51372f29401490b51c546366477a.pdf
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/21809401569.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0481/files/jibalamelagoxemogigujo.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_off000069f7.bin
8cb9ae8a5784fec1d862ca70a4e664ab0b3aa3cf12b44d4bd75a26dcd26507f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F7 5336 bytes
font_01_sfnt_off00007c14.bin
64ba5298e580b4be1547eced8fd886684f140c7a78cb72c081517387fb7b6b10
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C14 11248 bytes