Malicious PDF — malware analysis report

Static analysis result for SHA-256 51639be82fb5d3c7…

MALICIOUS

PDF

46.4 KB Created: 2020-08-19 12:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a0e79f2766dff6d55512332805bb583 SHA-1: 3a876df5c512db9ade198e948c08798e2eca9f3d SHA-256: 51639be82fb5d3c71bd821a829eb7543509fc7b81225265bdc14574daf2696c3
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One critical heuristic firing identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious destination. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. No scripts were extracted, and the PDF structure itself does not indicate further exploitation beyond redirection.

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=rajasthan+librarian+question+answer In PDF document text
    • http://files.florablackettdesigns.com/uploads/1/3/0/8/130813762/dibusumenebagina.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/1/0429/9050/2042/files/wewinalaxasaravisuxifujud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0922/0503/files/mavukaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5803/6889/files/posalagarusowodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/ontology_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4115/2406/files/mafabivafeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/79978506207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4414/1218/files/beautiful_disaster_series_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/xegipukezifosenixazixirir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/87727425682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5122/0134/files/bivarapowosijefasawikoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4619/8683/files/almost_single_advaita_kala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/addressing_modes_of_8085.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_off0000581d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x581D 5212 bytes
SHA-256: fc3421750ef0b58a5079fa310575ec111f53a80b0a9c40061746c2ec0e2e0412
font_01_sfnt_off000069e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E4 13304 bytes
SHA-256: 32f7bd56dba3a707cbe42c1c8ade61f15aa811651631fb3d586c896a9b215f72
font_02_sfnt_off000093cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93CD 7656 bytes
SHA-256: 565a6d7f41587b0c85e606b19f7706ff7f1d720767ee8a11dfdf2803fd1b1387

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