Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cbda4c0bd8949a5…

MALICIOUS

PDF

36.1 KB Created: 2020-08-13 06:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ef713b876c5c4a3b3faaa9cd0ae556d SHA-1: 9cad9ae7b8475e46a28fc3b4e07d3e7fac965505 SHA-256: 5cbda4c0bd8949a59045b1ae25262ca777da5665f871354583d9620bc5cb9d2e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one identified as a redirector to malicious infrastructure. The document body text and heuristics indicate a lure related to finding a PDF, likely to trick users into clicking the malicious link. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to increase visibility of the malicious redirector.

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=i+dreamed+a+dream+piano+accompaniment+pdf In PDF document text
    • http://files.honeyhopfarm.com/uploads/1/3/0/9/130969408/911abb.pdfIn PDF document text
    • http://files.emmamagidart.com/uploads/1/3/0/8/130874134/9233772.pdfIn PDF document text
    • http://files.tribalexperiences.com/uploads/1/3/1/3/131379743/xogolov-jebogudipigasaw-manubawokiwuza-sisubexajisenaf.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/1/0428/0451/0887/files/arabian_nights_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/81817548959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/52454021948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0840/files/59058744146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/sotafogijot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/teoria_da_argumentao_jurdica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/wogubedakejiduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5736/5670/files/1st_edition_dungeon_master_s_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/tekulizutokuxemavani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/vsepr_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/fusionner_2_en_1_seul.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F90 5028 bytes
SHA-256: ac1c36ada8a4de50ccbbcf49b2ae2df9a5983dc71ffa45b64204ab596b21fe89
font_01_sfnt_off0000608d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608D 10456 bytes
SHA-256: c0259382fc542aeeec13820cafdc90a9ade17a1e69c09521e28759a7758be4e0

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