Malicious PDF — malware analysis report

Static analysis result for SHA-256 98eb9846513fb787…

MALICIOUS

PDF

45.0 KB Created: 2020-08-17 18:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 083ba5174fa3a117e27b047266d40db2 SHA-1: 820a1db53d48df83a08c7ad222ba13e5c5d07004 SHA-256: 98eb9846513fb787dae4252da22f0e3783495413d45bcb8763e36ca468d1db68
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to a known malicious redirector service. The ML classifier also strongly flagged this PDF as malicious. The document body itself is heavily obfuscated, but the presence of the redirector URL suggests a phishing or redirection attack. No scripts were extracted, limiting the ability to determine the exact payload or persistence mechanisms.

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=uniformly+accelerated+motion+vertical+dimension
    • http://xafapa.joshgellers.com/uploads/1/3/1/3/131384169/3106683.pdf
    • http://files.pemmensgolf.net/uploads/1/3/1/3/131379612/febokibilodirina.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sosivizugepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/59713375466.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/lotumaxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/wifi_showing_authentication_problem_in_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/partition_of_bengal_in_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/tovemokazovajegedupage.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/download_the_notebook.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8233/files/probability_and_statistics_notes_for_gate.pdf
    • https://cdn.shopify.com/s/files/1/0436/9216/3227/files/tadesixan.pdf
    • https://cdn.shopify.com/s/files/1/0435/8147/2929/files/84103319909.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/ib_answer_key_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/7013854387.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9586/files/jaromedekudika.pdf
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/behringer_xr18_edit.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/84599102853.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000689f.bin
c9de3cf885bc1f397db195373b30b55ac6b8ee04699516ec072913374a1549e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689F 2020 bytes
font_01_sfnt_off0000721b.bin
2f30760da71f539cd838c2a7a207e29a0fed5246f602a378a9f43368cf1f662e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721B 5320 bytes
font_02_sfnt_off0000841c.bin
079d02b8ce1ab3c9efb59fc898c3a56e421ce72b9e6f727145ae40e2b87b4397		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841C 10068 bytes

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