Malicious PDF — malware analysis report

Static analysis result for SHA-256 455dcb6dcc1061f9…

MALICIOUS

PDF

68.5 KB Created: 2020-08-31 15:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 64d6a82bd07922787c87303ce675c0f0 SHA-1: fab576bde565713dd5c905434d8af62fa8b1938c SHA-256: 455dcb6dcc1061f97838334e447e03c38d1ead30b50b394922da27634e2dcf16
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one heuristic specifically identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL found in the heuristic, suggesting an attempt to direct users to malicious infrastructure. The presence of numerous links points towards a link farm or SEO poisoning tactic to increase visibility and lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=anidamiento+significado+informatica In PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/apposer_une_signature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/gudasoxibaperenafubixinar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/30266477361.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e32576_d6f1cbeb7bbc42cea18fd07a471facd4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7082a_9979be4eb1464c10806b914b6bc06089.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0c41e7_d52b1d1223ee4f0785a1c35717103b49.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_97af487722aa4dc08d086975bf48716b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_eb565f218451427fb885b22ba80aca81.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_727369acb38440cc9e82b2393f2d1ed3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9b5f63_900b4b4efd7f45038e5536e644979c0a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a96ba4d53c5d49dcb42b83e3e8453bac.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ecec20_dae3144f11c840df92a7fb784385212f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_441e3a808b99455dab9bd83af84f3a4f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a01749_3e8899c407a0464f9b3f312b0ecc6d58.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_30a319ecbfb8443d8351d97a3c243ee1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e73fea_db8494eb21c640a1babf8906583a534b.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB39F 1696 bytes
SHA-256: 9a98723dae936e7c7c8d502cfbcf27bf9f93cff28ba6a06675a6a95244fbc4de
font_01_sfnt_off0000bbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBC9 5300 bytes
SHA-256: 87633470341706b37531b4819b7817233b4bdaa304dd2e64bbb02f0cf6dc87f8
font_02_sfnt_off0000cdbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBD 17716 bytes
SHA-256: bc4f8e83025338d8506030fb317d8dc69b8818658ba3317b21152a1ee50c9bea