Malicious PDF — malware analysis report

Static analysis result for SHA-256 890e4ef240acc341…

MALICIOUS

PDF

46.2 KB Created: 2020-09-12 03:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bd9fc0916be75c8c56415bfaaf25a82d SHA-1: 36d99bdfdd9b9b122e8d6507f27e9e04ffcd6ef8 SHA-256: 890e4ef240acc341ea43fea98e6c97f9f9a8bff473cba17a500d2844e7b8c379
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/wix?keyword=formato+de+amonestaciones+matrimoniales In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static.usrfiles.com/ugd/b8c837_52637f0ed32840d0a19be67597a8bf2c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2f8cea_4706feceaa504682a7fcb4fdb7192d0c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/50988c_30dd15179d6049c8ac1ca36bd4a5b212.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3ce946_85e3d369496c4c03b79769ca964c8f4a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b56239_7598be4be15b4f108a24f1c6b63c0eb8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3ff21_a19531a9dcb849508bfe8bc7f3e2b6f0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2c250_4c87b592817a4660b0af9d3cbfabb128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7074/9856/files/4439643312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4324/9576/files/filmywap_2016_bollywood_movies_full_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/74602066619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1395/6007/files/52961579950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0641/8331/files/25417762235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/57057751366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3913/7697/files/offensive_security_certified_professional_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/aankh_maare_video_song_3gp_tinyjuke.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000666a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x666A 4828 bytes
SHA-256: 30d5d39deaebcd2de02a5e20865d0e821cbbb900063fd0676b0a469b6981e090
font_01_sfnt_off000076ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AB 11408 bytes
SHA-256: 9f1a5736d2ce8e1dcc00d13d4dd2f7320a94ab9f0c97212c84e69f0419d0cbf1
font_02_sfnt_off00009bc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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