Malicious PDF — malware analysis report

Static analysis result for SHA-256 128ed3e63288f678…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 10:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cac0d800b1312065e718daca1a3a780d SHA-1: 178b1369c13848f0b78371b46b1a36889ec97a29 SHA-256: 128ed3e63288f67828759881c85bc25d00528170341c70ee1fcb70379884e8fb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body is heavily obfuscated but appears to contain the same URL. The presence of a link farm heuristic further suggests a malicious intent to drive traffic to potentially harmful sites, likely as part of a phishing or scam campaign. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wix?keyword=motor+learning+and+control+concepts
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/reading_and_writing_shs.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/53323665075.pdf
    • https://cdn.shopify.com/s/files/1/0431/3323/9457/files/best_buy_credit_card_application.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/10447345385.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1e15348104e4cf1a43f89dd17fac07f.pdf
    • https://static.usrfiles.com/ugd/238140_f14eebc87cc047e39eeb1dcf02003876.pdf
    • https://static.usrfiles.com/ugd/b77b08_13fd86e8436b44e188cbaaf886836020.pdf
    • https://static.usrfiles.com/ugd/93c935_e7c50596c2524877b406d8b070e2562a.pdf
    • https://static.usrfiles.com/ugd/1f2646_3c8cfa1cccf54a7aa6f8bf855c8b5051.pdf
    • https://static.usrfiles.com/ugd/48f461_1e117d38efb847ebb5d2c23c3b4a9428.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/72202981368.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/rubric_assessment_examples.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006db8.bin
e5e3c5f9cff5e123aca1abab45269a4679f160cbda0a86e8e2bab8e0eeaf808e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB8 5248 bytes
font_01_sfnt_off00007fa1.bin
6cb96fe7b7b20aaa0583e7f8905ca747236f78a58fe5cfc26f1f730751a475cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA1 10188 bytes