Malicious PDF — malware analysis report

Static analysis result for SHA-256 500ad10b51c95bb7…

MALICIOUS

PDF

33.0 KB Created: 2020-08-06 00:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 163dffc7f9dc60bf3e9ce9abacec486b SHA-1: 5466e54fac40077ed17cca278d490b412d07fd55 SHA-256: 500ad10b51c95bb72a65599236ed743e735a5f9ae8adabeb647a429c7a46953c
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.cc/wb?keyword=canon%20lbp6230dn%20pdf`. This suggests the document is designed to direct users to potentially harmful content through a series of redirects, likely for phishing or malware distribution.

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/wb?keyword=canon%20lbp6230dn%20pdf
    • http://files.vfwpost612.org/uploads/1/3/1/4/131411281/3445404.pdf
    • http://kuvugotu.musictalentofcleveland.org/uploads/1/3/2/7/132740435/veworidovaxenek.pdf
    • http://zulaki.homesbycrosswinds.com/uploads/1/3/1/4/131408027/1237302.pdf
    • http://files.aldenmn.com/uploads/1/3/2/8/132814342/remubivaxoxajiduren.pdf
    • https://cdn.shopify.com/s/files/1/0437/2594/7029/files/47783767960.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/60823024252.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/tukuligidaxixu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/mutezobubu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/88252053369.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/97353771895.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/65919089753.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/digital_electronics_basics_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/xefadapojepepepur.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/57699682310.pdf
    • https://cdn.shopify.com/s/files/1/0435/8717/4557/files/midimor.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_off0000436f.bin
dc30dcf7b1369a48707de5a6531c46a004d108bfabead88fc3a1fcc4c55267d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x436F 5396 bytes
font_01_sfnt_off000055d3.bin
3fa62ae3aaab4dec05c70dbbc72c9dbaa0f3a6c9c5da7629e6b1efdb7cbfeef3
pdf-font-stream PDF embedded font (sfnt) at offset 0x55D3 9848 bytes