Malicious PDF — malware analysis report

Static analysis result for SHA-256 daeff2390424b20f…

MALICIOUS

PDF

42.3 KB Created: 2020-08-11 20:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d98e5ae9b4ef19dc9b07d345722131f4 SHA-1: 9cc8cbd3e407585ef93f138d9fbf311eabcbec01 SHA-256: daeff2390424b20f9a49dd4af719211c21a1e2343ce198fe64d60fa6909a6111
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical redirector to ttraff.com, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=goalkeeper+training+drills+pdf, indicating the document's intent is to redirect users to malicious content under the guise of training drills. The ML classifier strongly supports the malicious nature of this PDF.

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=goalkeeper+training+drills+pdf
    • http://kitujum.andrewphillipschmidt.com/uploads/1/3/0/8/130874038/9261ed597a7.pdf
    • http://files.phoenixlefae.com/uploads/1/3/0/7/130740141/begaka_loguzisarumivod_vezelukuzil_zazilit.pdf
    • http://files.strgir.com/uploads/1/3/0/8/130873868/4381992.pdf
    • http://files.smithcustomdesigns.com/uploads/1/3/1/4/131406222/mabazage.pdf
    • http://files.labradorpuppyforsale.com/uploads/1/3/0/8/130813132/simitepikuta.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdf
    • https://cdn.shopify.com/s/files/1/0441/3263/0680/files/detigi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4043/9446/files/21199717790.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77636621448.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lobusine.pdf
    • https://cdn.shopify.com/s/files/1/0446/9984/4762/files/fajutanezimoguboziwisip.pdf
    • https://cdn.shopify.com/s/files/1/0432/8446/3784/files/python_from_import.pdf
    • https://cdn.shopify.com/s/files/1/0441/1287/1576/files/mips_instruction_converter.pdf
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/fijegizisebobugazig.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7529/files/tokadixesa.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_off00006685.bin
a58095fdc1b8887a00f25654b857692569f7435eb1e8057cac7476cf380e216f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6685 5304 bytes
font_01_sfnt_off000078a4.bin
bbd93e3b7b3c09917c4c5f81859f1e320dddd91da511a3fe5b0cf985c537f140
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A4 10444 bytes