Malicious PDF — malware analysis report

Static analysis result for SHA-256 f248441b5ed49259…

MALICIOUS

PDF

47.1 KB Created: 2020-08-06 14:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 764c7268f20143bf958a8c605dff0266 SHA-1: 3e5f21b8e6fd87e5623fac98086e257044744344 SHA-256: f248441b5ed492596bedaf32a7c9383897a8d1b30a5853efd32e46198d5bd4e0
194 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with many embedded URLs pointing to various Shopify domains and other sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=upkar+ugc+net+economics+book+pdf+download'. This suggests the document is designed to lure users into clicking malicious links under the guise of providing downloadable content.

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=upkar+ugc+net+economics+book+pdf+download In PDF document text
    • http://vedifi.landscapeservicenassaucounty.com/uploads/1/3/0/7/130738837/9b63f476c.pdfIn PDF document text
    • http://files.sprucestreetnyc.org/uploads/1/3/2/6/132695620/posasalugudup-mapip.pdfIn PDF document text
    • http://files.bhumikafest.com/uploads/1/3/1/4/131454172/e0275.pdfIn PDF document text
    • http://files.theskinstudioltd.com/uploads/1/3/0/9/130968984/6664465.pdfIn PDF document text
    • http://files.historyspeaks.org/uploads/1/3/1/3/131379111/f13cb.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/1/0430/7592/8215/files/pokan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/87959049880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/40394859070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3782/6973/files/ktm_350_sxf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/88872465023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0464/9884/files/76203367155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/0326/1606/files/ciencia_natural_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/padaledivatazomoleri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/holt_california_life_science_7th_grade_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/loposowuzakofatala.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_off000069ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69EC 5760 bytes
SHA-256: f2767b219762200c099334d9b04e992ce2a86c7851ed086c9f0dcfc36187de55
font_01_sfnt_off00007d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D85 15256 bytes
SHA-256: db1d5391f67322c79a22c76c17113c7e8e316abd96cdd4f01f0cc0142a3baeb6

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