Malicious PDF — malware analysis report

Static analysis result for SHA-256 640ecdf4d438bef8…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 04:30:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffeaebe2a6251f5941ffda8d1aa43148 SHA-1: 77882a2c235cc584d5947ee7aa6b8071d0cee855 SHA-256: 640ecdf4d438bef899dd31d0cbf4827e616f509adcaf7e21a7df02c37b7985d2
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm. One of these links, https://ttraff.cc/wix?keyword=lcd+vs.+plasma, is flagged as a malicious redirector. This suggests the document is designed to drive traffic to malicious infrastructure, potentially for SEO manipulation or to host further malicious content. No scripts were extracted, but the presence of numerous external links and a malicious redirector strongly suggests a malicious intent.

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=lcd+vs.+plasma
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/dafozuzovidomuxof.pdf
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/mobenukineruwenizibak.pdf
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/2984801135.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8816/files/pebibobarijidukidisorizez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokixud.pdf
    • https://static.usrfiles.com/ugd/67e251_cd65e4761cf2436c8dea0e3f2f3c6f69.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e3a30113151436e925358d05a45388e.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebc206580f4e41639b32a3acb87238f6.pdf
    • https://static.usrfiles.com/ugd/b27199_d8ced354a14240c489f14ce738bcc477.pdf
    • https://cdn.shopify.com/s/files/1/0432/7679/6057/files/54697523642.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/51010555311.pdf
    • https://cdn.shopify.com/s/files/1/0434/1107/9317/files/t_sql_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/phtls_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/5258/7415/files/diablo_2_rune_runs_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/4055211989.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/787905770.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_off000068ab.bin
273889edc92e2206ef7c2a94eab1afc5dbb658b56c1438b01436660003053b54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AB 4484 bytes
font_01_sfnt_off000077e4.bin
eca0ffb659199844250f8a9787715b566dbaba92a8a2b3428c64e7038f03839b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E4 10504 bytes
font_02_sfnt_off00009b3d.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3D 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.