Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c7a55c94f548e0…

MALICIOUS

PDF

70.5 KB Created: 2021-01-10 16:58:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56ae41ca52e87efc46b361d2996c5676 SHA-1: ba7e4ed1588e6290153f7fd49662bea38f9af033 SHA-256: 44c7a55c94f548e08558b98621ebf7127e57de84b95d676e4a02c74b38699ea1
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://gettraff.ru/123?utm_term=nerf+sledgefire+shells+cheap' is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=nerf+sledgefire+shells+cheap
    • https://site-1191329.mozfiles.com/files/1191329/kopudasesomono.pdf
    • https://static.s123-cdn-static.com/uploads/4369916/normal_5fe0cff7258c6.pdf
    • https://site-1178235.mozfiles.com/files/1178235/nejemalekiwivu.pdf
    • https://cdn-cms.f-static.net/uploads/4458623/normal_5fd1a5c684122.pdf
    • https://site-1197825.mozfiles.com/files/1197825/kiki_camarena_actor.pdf
    • https://static.s123-cdn-static.com/uploads/4467955/normal_5fdccb6e6f5c3.pdf
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f8d7c33c8c7d.pdf
    • https://site-1171554.mozfiles.com/files/1171554/52337223362.pdf
    • https://static.s123-cdn-static.com/uploads/4477387/normal_5fcabd66f16e2.pdf
    • https://static.s123-cdn-static.com/uploads/4384028/normal_5ff31b2d052b6.pdf
    • https://site-1176426.mozfiles.com/files/1176426/cheap_mudding_four_wheelers_for_sale.pdf
    • https://cdn-cms.f-static.net/uploads/4405194/normal_5f9e637b683aa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kavitokolezub/lamparas_solares_para_alumbrado_publico.pdf
    • https://s3.amazonaws.com/dukexajuj/intex_easy_set_pool_pump_instructions.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_off0000c986.bin
7cee4f267d2c85e6f8ccd48390e81508584e05c683d224321470427712372e07
pdf-font-stream PDF embedded font (sfnt) at offset 0xC986 4876 bytes
font_01_sfnt_off0000da2b.bin
5967dfa508137fd25e488b3897c06511891f45b6a41ea2f3b4c2822729f13bf6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2B 10836 bytes
font_02_sfnt_off0000ff13.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF13 4324 bytes