Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d351c282daa35f8…

MALICIOUS

PDF

60.7 KB Created: 2020-09-20 10:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e049f9a91a64de68d954c4943d768ed SHA-1: 43f831a7a74866e39caa66f4536adb0d80f2be95 SHA-256: 9d351c282daa35f8f671163e7b1cf62921d4729e47926564638dfdd1013d6a97
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to known malicious redirectors or link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to redirect users to harmful sites. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the primary attack vector appears to be the extensive use of malicious URLs within the document.

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.link/wix?keyword=temprid+sc+epa+number
    • http://mepofaku.jamesportcigarco.com/uploads/1/3/0/8/130813528/rimerosujozowev.pdf
    • http://mavuxu.lufkincommunityband.com/uploads/1/3/1/4/131437421/nonaledorunato-firusobifetulu-juxekutuki.pdf
    • http://konafozik.pacificislandaqua.com/uploads/1/3/0/7/130776063/fewurutabume.pdf
    • http://files.m4detail.com.au/uploads/1/3/0/7/130739544/xapawexi.pdf
    • https://03bf863e-d923-43a9-b052-00b4b33234bd.filesusr.com/ugd/d1c05f_b2f655d8442941e38247b07a84979756.pdf?index=true
    • https://3972c4d4-893b-486d-b5d5-479afa871892.filesusr.com/ugd/0aab01_daf71835aa994221acff05125df7894c.pdf?index=true
    • https://94cc3c4f-105f-45bc-b132-8764b0c692dd.filesusr.com/ugd/bb3bf9_746c48df917a4282879621aa25501f09.pdf?index=true
    • https://201c6f9f-fb74-467e-b656-6a309683856b.filesusr.com/ugd/ebcc4b_2777a39d09f74a9d99b4750a2f3c6867.pdf?index=true
    • https://12802128-b0c0-414c-9896-4f85dfcf482e.filesusr.com/ugd/08338c_d0adaa745de24003bb555d76e6454fb0.pdf?index=true
    • https://d99a6850-51ab-4288-b59d-6916d03990f2.filesusr.com/ugd/d2751c_1eda7fe9141e4f3ab8d929ac6e301bd8.pdf?index=true
    • https://09311cd8-e01e-441f-a380-38baf7b73a18.filesusr.com/ugd/197ed4_99f110a7d8eb4f9b9efade6b96952540.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0439/0833/3736/files/push_existing_repo_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4183/files/chamar_status_video.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/lorubanezuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/ba_final_date_sheet_2019_kanpur_university.pdf
    • https://cdn.shopify.com/s/files/1/0430/6075/6641/files/zidunaxusujoneluzenolufo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae29.bin
94cac9f8dea8e7269bb9e1163bcc532a54b031ec24a1ee70dd336dfa91ac4b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE29 5276 bytes
font_01_sfnt_off0000bffa.bin
a611af2afe3145291935c43c1e7161b92332d4626da22c4c282a914bd1080526		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFA 10580 bytes

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