Malicious PDF — malware analysis report

Static analysis result for SHA-256 a340a1066c1bb8d7…

MALICIOUS

PDF

41.5 KB Created: 2020-08-04 14:09:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 57583a949942189394eca653e2542a4f SHA-1: 9accbf4958aaad901d1273c8d9a2e899889f3519 SHA-256: a340a1066c1bb8d73c72d36db1d9f439d62abbe5dbf94d211bc47f8fea02e0ac
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=trastorno+ansiedad+por+separacion+pdf'. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a link farm or SEO poisoning attack designed to redirect users to malicious content. No scripts were extracted, limiting the analysis of direct payload delivery.

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=trastorno+ansiedad+por+separacion+pdf In PDF document text
    • http://xesapi.communityactionboonewinn.org/uploads/1/3/0/7/130739826/7fde1f66c64c98.pdfIn PDF document text
    • http://files.exclusivesb.com/uploads/1/3/2/6/132683267/jukekewuvot-dujedame.pdfIn PDF document text
    • http://files.ames-center.com/uploads/1/3/0/7/130775922/gasunezonabojurowiw.pdfIn 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/1/0432/6470/4665/files/benavemikumibo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8624/1187/files/sojujenuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8078/5823/files/12599444323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/96056065099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3119/8886/files/70945040946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/84692981690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8918/0310/files/madea_goes_to_jail_gomovies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/2935465593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7912/2587/files/73120893169.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 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 5064 bytes
SHA-256: de8049c2e075cb515b82b2507d99296ba31e03faa7f4372d4946269a1cc2919a
font_01_sfnt_off000073ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 10992 bytes
SHA-256: 074e86020703af8923054281e993e77aafe48f71f521c89ba8b5504583de75eb

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