Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b841963bc60fe3…

MALICIOUS

PDF

106.6 KB Created: 2020-08-24 20:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28d5871186f568baa8790aeea667775a SHA-1: 1ae76513f9456637112c02e4a03e3c7e9c977bbe SHA-256: e9b841963bc60fe32f8684c17ebea7250a49e67a78ac269392388b003d3e571e
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=new+melody+songs+tamil+2019', points to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'new melody songs tamil 2019' and authoring application details, likely as part of a lure to disguise the malicious links.

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=new+melody+songs+tamil+2019
    • http://batejo.aliveaccelerator.com/uploads/1/3/2/6/132680903/pekukigegek_wovurofi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/british_slang_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/devevefatogisetadan.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/81661158910.pdf
    • https://cdn.shopify.com/s/files/1/0435/5706/0769/files/uniformes_arrieta_hermosillo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/saganeninikosiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/1326/6846/files/pofijubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/70485725594.pdf
    • https://cdn.shopify.com/s/files/1/0433/5153/9861/files/bebab.pdf
    • https://cdn.shopify.com/s/files/1/0437/5402/9207/files/fugaxunijizamatugovul.pdf
    • https://cdn.shopify.com/s/files/1/0434/2172/8918/files/peziparusezibajoduwideg.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/rusixitegeloxojemiwasabu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ed6.bin
94fc2615356abb6edd810345d5cff801aa7e4ee9fe782cb6f15f90458ab6da1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED6 5484 bytes
font_01_sfnt_off00016187.bin
263ee0c3ca5ca29b015285884dbaecb59626542cec19f77dc9a78e1b071223f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x16187 14780 bytes
font_02_sfnt_off00018fbc.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x18FBC 4324 bytes