Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd8952233203f6d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-16 16:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5022764409c59d0cb9c096e3cd8912d SHA-1: 512c2ecaf63c91e7b560654fcb4643ac29082de0 SHA-256: 3cd8952233203f6d7e9bf1acb5300db34babe40bbf2a767304391c89a21e7a64
194 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, mentions 'Filing form i- 485 checklist', suggesting a lure to trick users into clicking the malicious link. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious content.

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.cc/pify?keyword=filing+form+i-+485+checklist In PDF document text
    • http://gebani.buildmenard.com/uploads/1/3/2/8/132814930/rosovutaguw.pdfIn PDF document text
    • http://files.natasharemi.com/uploads/1/3/1/3/131382274/ad30ded.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/1/0429/2601/4630/files/66304313916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/battle_royale_japanese_movie_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/limezoxuravevudepejav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/21331846861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3822/6085/files/loneliness_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9168/1699/files/66004986478.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7872/files/gifoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/the_conquest_of_alexander_the_great_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7273/2836/files/23417388955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/list_of_english_words_with_meaning.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 1

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_off00006a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 5540 bytes
SHA-256: d6663b58dec9b711b563c798f04716981b2c869dde10905320ce6ac184659d34
font_01_sfnt_off00007d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D27 10564 bytes
SHA-256: f55a3caaf211c57ec64c6a9f3baaaa99715995a35f1cf4471d93fc71546c20f5

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