Malicious PDF — malware analysis report

Static analysis result for SHA-256 73836d2d8eae0b05…

MALICIOUS

PDF

47.3 KB Created: 2020-08-04 20:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 62a502e2585b42ece0159c12c00b4c29 SHA-1: 0ebb2aad42f567f32b82b34e01c7a8c84f58e383 SHA-256: 73836d2d8eae0b05311dc067ecb87e6b7b5f89c486c68e714dd69477b6557e79
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 domain, identified as a redirector for SEO spam. The document body, though heavily obfuscated, contains the malicious URL, suggesting a phishing or scam attempt to trick users into downloading further malicious content. The ML classifier strongly indicates maliciousness.

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/pify?keyword=asperger+en+ni%25C3%25B1as+pdf In PDF document text
    • http://files.kudzusurvey.com/uploads/1/3/1/1/131163610/fuminigugubagax-dovikuxezawud-wiruj-tubis.pdfIn PDF document text
    • http://files.elizabethballare.com/uploads/1/3/1/4/131453252/todatun.pdfIn PDF document text
    • http://files.courtneytravels.blog/uploads/1/3/1/4/131437295/6170751.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/1/0438/2644/6498/files/26645421469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58014629257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7919/7081/files/public_ntp_server_us.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99397771733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/20328689244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/tally_accounting_software_shortcut_keys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/bivuzami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/7440727323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9827/4978/files/39249350873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nezaneseku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/ap_amumu_build.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 3

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_off000077df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DF 5380 bytes
SHA-256: b7e8321cb8cab80cf323ac5eb1b2a913221a9db25fe963c26176d65a7b741a94
font_01_sfnt_off000089fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FB 11420 bytes
SHA-256: 4540fe589a258016bdc9b47c9d8cf403664c8d6a7585619fda11856d3713679e

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