Malicious PDF — malware analysis report

Static analysis result for SHA-256 0567c0b43a5088ef…

MALICIOUS

PDF

36.9 KB Created: 2020-08-15 03:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 852e1bf71d0d7e0f00d65d364684037d SHA-1: fb5b0e1628a8b7663c461f73c502ec3a2741bdc5 SHA-256: 0567c0b43a5088ef366c9e2bdda9b264ecc7fbd98073fe563dcc135065693d2a
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, forming a link farm. One of the primary links directs to a known malicious redirector at 'ttraff.ru', indicating an attempt to lead the user to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=baazigar+o+baazigar+karaoke
    • http://files.lammco.com/uploads/1/3/2/6/132696128/fuzedoripu_xelimimalid_letobi.pdf
    • http://files.hannahsclassroom.com/uploads/1/3/2/7/132712139/mefotusirog_motosalaruwegoj_bosur.pdf
    • http://sipatubej.christopherkrieg.com/uploads/1/3/1/4/131438177/6997374.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99397771733.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/espier_launcher_ios_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/bsc_first_year_botany_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/kinimuresigakesewagixemo.pdf
    • https://cdn.shopify.com/s/files/1/0438/0822/7490/files/zosekemowa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/80431352614.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/walewifatazu.pdf
    • https://cdn.shopify.com/s/files/1/0454/7385/7686/files/electrolytes_for_electrochemical_supercapacitors.pdf
    • https://cdn.shopify.com/s/files/1/0437/9960/9505/files/catabolism_vs_anabolism.pdf
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/10780243210.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/al_arabiyyah_bayna_yadayk_book_1.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005392.bin
bcb468cc8fd0ed39cbfb26e4861d85beff06c9ec6ff6b116ec5680a02b79e151
pdf-font-stream PDF embedded font (sfnt) at offset 0x5392 4948 bytes
font_01_sfnt_off00006483.bin
222cbb953bb5fb91da447dc50a7f93955040ea76a8904888933651cd88414bd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 10140 bytes