Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35520de492e5547…

MALICIOUS

PDF

53.2 KB Created: 2020-08-19 08:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d5d21929495762bec783e5f048fdcd8d SHA-1: b0a07c92f03ee836f1ca85e82e628a8073dbefc0 SHA-256: e35520de492e554795ad4667c6ecc1cfca2b376e38934acb2df2d2c31f561f77
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm points to a content-driven attack, likely for SEO spam or to lead users to phishing sites.

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=animals+martin+garrix++song In PDF document text
    • http://gijerus.inspectnj.net/uploads/1/3/1/4/131437949/lepigululuwopa.pdfIn PDF document text
    • http://vevatu.lunafiberartist.com/uploads/1/3/1/1/131163494/pebusotoleg.pdfIn PDF document text
    • http://files.hdb-door.com/uploads/1/3/1/8/131855992/5718e1acb.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/1/0453/6303/6315/files/36392867823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5696/2467/files/52291118032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5436/6877/files/98527155885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9449/7698/files/ayn_rand_philosophy_who_needs_it_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8155/4325/files/37074433072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4402/8068/files/vezaderedameje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3567/3254/files/bawara_mann_dekhne_chala_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9373/8143/files/17598820918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4188/2265/files/73812363493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0816/files/www._mytechkey_pages_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4321/7830/files/harvard_business_school_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/58239388159.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 6

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_off0000867d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867D 5060 bytes
SHA-256: 275837173ca18097ae8121569f4050358c1155217cb17879e5644f579763a7a9
font_01_sfnt_off00009792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9792 15940 bytes
SHA-256: da48b46f6d83e71c5653cf46372b22ac93fe13ede6a0948703be998744e32bff

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