Malicious PDF — malware analysis report

Static analysis result for SHA-256 024329d32ff0e8c5…

MALICIOUS

PDF

41.2 KB Created: 2020-08-12 20:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42892312ff796562114c13af380c09bc SHA-1: efa325987f7f81747758dc840880fc5bbd3f9447 SHA-256: 024329d32ff0e8c5d5d8adef510323395cb51338b29a1f52a6e4805fe3c68ff6
154 Risk Score

Malware Insights

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

The PDF contains a lure related to passport renewal forms and includes a high number of embedded links, many pointing to a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=renewal+passport+form+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure.

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=renewal+passport+form+pdf
    • http://ruvidun.crystalfallstradingco.com/uploads/1/3/1/6/131637016/besatopej.pdf
    • http://files.akws.org/uploads/1/3/1/3/131398367/wujagizixofipi-rakik-kenafanokuf.pdf
    • http://files.paminingprofessionals.org/uploads/1/3/0/7/130775182/lexopuxadake.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/54514057538.pdf
    • https://cdn.shopify.com/s/files/1/0428/3147/8950/files/bizewafetuxatomutupiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4419/2935/files/74617462305.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/bejoxefuwagixavife.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/rowamodesela.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/38476061918.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6807/files/armonicos_en_la_red_electrica.pdf
    • https://cdn.shopify.com/s/files/1/0435/9041/8591/files/mixiwatazepaxexoleziwati.pdf
    • https://cdn.shopify.com/s/files/1/0436/6853/7497/files/koropologabug.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/data_warehousing_toolkit_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/zozipulojejerolopalefaz.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_off00006292.bin
ca761ee287e4ace0c4711681aad45de662bc4da296184c2dbc5900f67783cfdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6292 5284 bytes
font_01_sfnt_off00007488.bin
b82361fbaa196fc7b0cac2750215a6d1b99f0b537bc6feaf3414f4c0318cf761
pdf-font-stream PDF embedded font (sfnt) at offset 0x7488 10352 bytes