Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4ede75051a10668…

MALICIOUS

PDF

39.8 KB Created: 2020-08-28 04:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df59d054f24e46fd5a797288be6c88c4 SHA-1: b995378fb62e7982a9fcedc3bd172e90bcbf6e0c SHA-256: e4ede75051a10668e40d8a4cc189e6232df7c32aba39d6e52ed5209af04501d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the text "Reingenieria de software" and the malicious URL, suggesting a social engineering lure. The presence of a large number of external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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/pify?keyword=reingenieria+de+software
    • http://files.colacotwayartstrail.com/uploads/1/3/2/6/132681378/jefamixizo-zejexelelovezid.pdf
    • http://totulo.jphono1.com/uploads/1/3/0/8/130814328/9885746.pdf
    • http://files.mckevlins.com/uploads/1/3/1/3/131379718/1430219.pdf
    • http://files.ruthstoneartist.com/uploads/1/3/1/8/131858540/fidudulavamuvu_nudijerori_zozonaxogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/31079270118.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/eros_guide_las_vegas.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/hasmonean_dynasty.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/sewabulaje.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/78541344187.pdf
    • https://cdn.shopify.com/s/files/1/0433/7850/7934/files/87176873869.pdf
    • https://cdn.shopify.com/s/files/1/0438/8130/0123/files/kaiapoi_weather_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8281/files/58132823150.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/vofojetizoxudarawodoj.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/
    • https://cdn.shopify.com/s/files/1/0433/7850/7934/files/871

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fc6.bin
e5c3babe7846ef8c4be2560f095df7d479ca7f579c43c0dc1b470603a7395e18
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC6 5140 bytes
font_01_sfnt_off00007162.bin
43f5e1a136318dc9ae2877d255cade8406c71739d05e185c8d57e80a4a8fe7c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7162 9636 bytes