Malicious PDF — malware analysis report

Static analysis result for SHA-256 85298dbd5c2cd069…

MALICIOUS

PDF

52.0 KB Created: 2020-08-09 10:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a4d12d38553a68b7a895689b9474555 SHA-1: f970fcfd8786ad98d81b504fccc4204b27d7d572 SHA-256: 85298dbd5c2cd0691df77a491556adf6a152817517e36077fc47a5b0ae9ccd0c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Brighton rock pdf' and URLs that are likely part of a link farm designed to lure victims. The ML classifier also strongly indicated maliciousness.

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=brighton+rock+pdf
    • http://vebofedor.dogwittraining.com/uploads/1/3/0/7/130738848/pogojobugurowalirox.pdf
    • http://files.doodadsandfandangles.com/uploads/1/3/0/7/130739158/savemasen.pdf
    • http://files.athletetrainingsystems.co.uk/uploads/1/3/0/7/130775032/4924271.pdf
    • http://fedemo.timothy-tate.com/uploads/1/3/1/6/131637136/4ea8bebf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/8787/9587/files/gunirigeforubigomamunoxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5169/files/anfotericina_b_complexo_lipidico.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44219577828.pdf
    • https://cdn.shopify.com/s/files/1/0431/1089/1680/files/libros_de_arquitectura_de_computadoras_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0440/8960/6294/files/2542690939.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/32570065476.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/zidewebojopuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5842/files/trilogia_bella_y_bestia.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/miwixikefuraw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/taridulozomoxekolakinuku.pdf
    • https://cdn.shopify.com/s/files/1/0451/6714/9210/files/10651265102.pdf
    • https://cdn.shopify.com/s/files/1/0438/3693/2253/files/nojetomogobur.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/dimulelo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080f9.bin
ba9be875302a7cb286235830bd4854b895364eb2dadb11dee8077d5426b60ffa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F9 4780 bytes
font_01_sfnt_off00009129.bin
1a2834a409224e89ced14b0e0244c61e25f5547e61aff3768b2176db4de48e13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9129 10444 bytes
font_02_sfnt_off0000b4e0.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E0 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.