Malicious PDF — malware analysis report

Static analysis result for SHA-256 6513e503af610b00…

MALICIOUS

PDF

41.3 KB Created: 2020-08-19 15:23:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40226ba3f672f07279ee3047ae6aaafd SHA-1: 3e60b79d93a21395efe65f0b29235c46e1aaf89c SHA-256: 6513e503af610b00def81140205190e3f8812b8fb9946e75d760e4fb9a24c2ac
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, disguised as free invitation templates. The ML classifier strongly indicates maliciousness, and the PDF structure includes a large number of external links, suggesting a link farm or SEO abuse tactic. The primary malicious IOC is the redirector URL.

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=free+invitation+templates+for+50th+birthday In PDF document text
    • http://files.awarenessofnothing.com/uploads/1/3/1/6/131606874/vurud.pdfIn PDF document text
    • http://gitin.drdarrencbrennan.com/uploads/1/3/1/6/131606490/88080cae6e6d.pdfIn PDF document text
    • http://files.fundamentallysoundbasketball.net/uploads/1/3/2/6/132681954/febatuxutadudebebam.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/1/0451/1226/2821/files/android_search_action_bar_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/62432936169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2556/2785/files/42028125794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7038/2485/files/6995223747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0809/0535/files/96703198509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7218/3703/files/zefezadulevezofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4325/0588/files/22021568852.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2634/6147/files/social_security_tax_withholding_form_w-_4v.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6576/0151/files/53962027632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3055/9390/files/secret_garden_adagio_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6678/3899/files/penikitavulofumiki.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_off000062b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 5804 bytes
SHA-256: e683ee9ce6fcae9702c4f8a3a18af3991a54ecba8302b551e55ec2eb902661ec
font_01_sfnt_off0000764a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764A 9936 bytes
SHA-256: b64b86a3bee450d2a08315b98c57b8860c5f4c1a75513daf66d4bb86bc5b7e5b

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