Malicious PDF — malware analysis report

Static analysis result for SHA-256 8daedba14cbceda8…

MALICIOUS

PDF

40.0 KB Created: 2020-08-07 17:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 765507fa20172436073532db5e11a5c8 SHA-1: ebd2b6d8ef8538c2511de2d2ad0dc8f66a0a137e SHA-256: 8daedba14cbceda85577e18f44fdadc4bc3a961d4f48658189a3304828bcf0ca
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The primary purpose appears to be SEO poisoning, directing users to potentially malicious sites through a link farm.

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.com/wb?keyword=chess%20board%20image%20pdf In PDF document text
    • http://files.psignologic.net/uploads/1/3/1/4/131453226/jejixedenaregi.pdfIn PDF document text
    • http://files.usbehavioralsupport.com/uploads/1/3/1/4/131437253/5357875.pdfIn PDF document text
    • http://files.fustlerthefemalehustler.com/uploads/1/3/0/7/130739839/gaxiwoloxakutenuboj.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/1/0432/6411/4843/files/facilities_planning_tompkins_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/calligraphy_alphabet_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/everything_i_never_told_you_book_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/xirinomafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1961/5901/files/firebase_query_by_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/7750896330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1905/9868/files/biography_of_mahatma_gandhi_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/13515948428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/canzoni_scout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/mumejovilowarubijelanazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9144/4390/files/budding_in_bacteria.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_off00005e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E64 5468 bytes
SHA-256: 4bca80070dcf4636dfa6bcb0ab3a3f5c76d3d235c659172e444f4b0c818b7c34
font_01_sfnt_off000070c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 10156 bytes
SHA-256: 0f66ce31cb7d34177cbd462667ec3639edef27f4b2c51d606d74f71102b938d6

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