Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc0f150135efe52f…

MALICIOUS

PDF

68.3 KB Created: 2021-01-13 00:42:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8e8a2820a23167eb16a4a17ac85eed1 SHA-1: 9290b07c863be0422c808b2b078d1ce5694bc26f SHA-256: bc0f150135efe52ff1ce4d5eabdb65ca8fb3da34e5f9071c7342133e8d28d148
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are designed to appear as legitimate document downloads or search results, but ultimately redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to 'traffmen.ru', indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffmen.ru/123?utm_term=haynes+2006+scion+xb+repair+manual
    • https://cdn.sqhk.co/rawerusiwala/cIgdji4/ikea_hours_today_winnipeg.pdf
    • https://zelikozuka.weebly.com/uploads/1/3/4/5/134594864/gimojesatexodalalapi.pdf
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/7532601.pdf
    • https://site-1198415.mozfiles.com/files/1198415/95535602686.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pisik/98637433815.pdf
    • https://s3.amazonaws.com/tezude/certificate_layout_free.pdf
    • https://s3.amazonaws.com/robumuduluwise/kings_theory_of_goal_attainment_example.pdf
    • https://s3.amazonaws.com/widiku/77853457865.pdf
    • https://s3.amazonaws.com/vexeliku/bomag_bw120ad-_5_parts_manual.pdf
    • https://s3.amazonaws.com/remoxi/vpn_master_app_download.pdf
    • https://s3.amazonaws.com/kukazowox/dikosuzetexukiv.pdf
    • https://s3.amazonaws.com/didowugorokirug/badlands_cast_2018.pdf
    • https://s3.amazonaws.com/tozaduliwubega/cd4049ube_ic_datasheet.pdf
    • https://s3.amazonaws.com/tiniruru/public_policy_analysis_william_dunn.pdf
    • https://s3.amazonaws.com/gixawetopoli/google_camera_xiaomi_mi_a2_lite_apk.pdf
    • https://s3.amazonaws.com/remufuzu/ignou_b._ed_2018_admission_form_date.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_off0000c906.bin
d3c688729b8d3795e48d587a26364b9a443dc9b4277a9383fefe93465b5a55e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC906 5776 bytes
font_01_sfnt_off0000dc9c.bin
28c1a632bb5f6993ce325a6e3dab01caad5e889f7bf4624ba97d56ebd93d8130		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9C 11188 bytes

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