Malicious PDF — malware analysis report

Static analysis result for SHA-256 96026331be82d239…

MALICIOUS

PDF

44.1 KB Created: 2020-07-30 06:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12f12c7345f8d42c7c2b1a13de5c9145 SHA-1: 27eb39aec4eb220cabcff72f0bedc9ddfc9b81da SHA-256: 96026331be82d239696ceed0c286a8bb5b6fd4906cd0425ed0e33527a386b0ca
152 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs designed to lure users to external sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to ttraff.ru, a known malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many hosted on Shopify, suggesting an attempt to distribute malicious content through a link farm. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this document.

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.ru/pify?keyword=ad+hoc+and+wireless+sensor+networks+pdf
    • http://files.maryjanescott.com/uploads/1/3/0/7/130739155/dukoxal_kezamidixam_sazesubogovisu.pdf
    • http://files.wecvacations.com/uploads/1/3/2/6/132682723/dofosozuwexeb.pdf
    • http://files.lifestreamfamilywellness.com/uploads/1/3/0/7/130738615/runisobexip-rokunox-raxijoxujonupe-metok.pdf
    • https://cdn.shopify.com/s/files/1/0434/3509/8264/files/wavuduwusigeje.pdf
    • https://cdn.shopify.com/s/files/1/0430/3149/4810/files/36896776516.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/52231742098.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/buvugizaxebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/86281562318.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21086069096.pdf
    • https://cdn.shopify.com/s/files/1/0437/7598/3778/files/sizenuzaledi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/piviriluzuzorita.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/larabobed.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2720/files/27615599239.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/valudagatinonijuvi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27622062760.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_off00006f18.bin
cfbbe96bdc92c3a1b956c7ae55626c0d326be74827c7dd4f8f24ec322537c497
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F18 5176 bytes
font_01_sfnt_off000080b1.bin
0c2582cb20630f822f9cb926e0242ae6982cf133557b72c9ba4f368e02905be7
pdf-font-stream PDF embedded font (sfnt) at offset 0x80B1 10096 bytes