Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecfc10d77436ba5a…

MALICIOUS

PDF

39.7 KB Created: 2020-08-20 00:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4986309a58e41601240c762c51d728e SHA-1: 6044052ef8412db0c7c18b65cee374b92cd7090c SHA-256: ecfc10d77436ba5acb90cf4a02e168fe59a3ee258b8d53383f98dca86afbad02
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.com, which is known for redirecting to malicious content. While no scripts were extracted, the sheer volume of embedded links points to a deceptive or malicious intent, likely to lure users to compromised sites or for SEO spam.

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=bhakti+ringtone+radha+krishna In PDF document text
    • http://files.halfmoonagile.com/uploads/1/3/0/9/130969389/2825428.pdfIn PDF document text
    • http://files.novanuae.com/uploads/1/3/1/4/131407469/pupanuxelematugetuxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/role_of_liver_in_carbohydrate_metabolism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4177/8838/files/tech_bulletin_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4889/3606/files/21481101304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5534/8888/files/tajilomono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7868/0730/files/42966536733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/sample_commercial_lease_proposal_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/lezanepizowakagefezejegib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5143/4652/files/vexaruge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1059/6765/files/food_diary_sheets_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/27728749311.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000042e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42E5 5168 bytes
SHA-256: 32c4eb53cca7e3c3b33be9a599c11cad15a680d6718e9c75934667014a01cd9f
font_01_sfnt_off0000546e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x546E 9344 bytes
SHA-256: 502c0261adaea8729cfd31510d80875a0f56be2e700174468ad1d2f39eba2386
font_02_sfnt_off000074c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C3 7948 bytes
SHA-256: 6dff86d1ae210118c0154c96e9ebe5ebd852db6e3b8235acd775587099303c9d

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