Malicious PDF — malware analysis report

Static analysis result for SHA-256 4506ae8ebe298496…

MALICIOUS

PDF

39.7 KB Created: 2020-07-10 10:55:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 845a16dd794da7fd444257183230980f SHA-1: b360d01744adf5fc4bb34f0a414e879fb74549f1 SHA-256: 4506ae8ebe298496eeb4995eb5afc87e91d8020383dfc35017f0e1ffd4ae3a67
224 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to suspicious domains and a known malicious redirector. The document body text and link keywords suggest a lure related to 'alkalinitas adalah pdf', likely intended to trick users into visiting malicious sites. The primary attack pattern involves social engineering through deceptive links within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=alkalinitas%20adalah%20pdf In PDF document text
    • http://files.wineworldcup.co.uk/uploads/1/3/1/4/131406527/9715972.pdfIn PDF document text
    • http://files.shaakirasharifeducationalpsychologyandtechnologyprogram.com/uploads/1/3/0/7/130739463/pasos.pdfIn PDF document text
    • http://files.drawingescapes.com/uploads/1/3/0/8/130813357/xobagolaxi.pdfIn PDF document text
    • http://files.lynnkirkham.net/uploads/1/3/0/8/130874318/6548217.pdfIn PDF document text
    • http://files.314vbc.org/uploads/1/3/1/0/131070112/635906c4af5.pdfIn PDF document text
    • http://files.emeraldpreschoolandkindergarten.com/uploads/1/3/0/8/130874544/9350766.pdfIn PDF document text
    • http://files.pegsjewels.com/uploads/1/3/2/3/132303378/bigimed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pukidolaza.files.wordpress.com/2020/06/62690855200.pdfIn PDF document text
    • https://jurovofat.files.wordpress.com/2020/06/mezesu.pdfIn PDF document text
    • https://fujezarek.files.wordpress.com/2020/06/jupokigedovepuwu.pdfIn PDF document text
    • https://vokosufike.files.wordpress.com/2020/06/dadose.pdfIn PDF document text
    • https://sisukone.files.wordpress.com/2020/06/37865786711.pdfIn PDF document text
    • https://neguraxopon.files.wordpress.com/2020/06/kimorojopatujume.pdfIn PDF document text
    • https://rebaxoduzun.files.wordpress.com/2020/06/dukivij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fusuzirosaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fodafozisejuleluz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85155057715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 4648 bytes
SHA-256: 9f9f66b7e43082b6d17e79d8c38875b5df9eb9972aecb278a6aaa1a635c716be
font_01_sfnt_off0000704e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704E 9780 bytes
SHA-256: f6327f6c9f371f389f4c87d493332664a0c93af975414432f2e20496fd202d6c