Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53fc08b25a7b29a…

MALICIOUS

PDF

47.2 KB Created: 2020-08-22 12:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0c67d20d603f99177661deeb7cef45b SHA-1: 996f95b1a514143c09d9c9e344b39d8a430f5261 SHA-256: f53fc08b25a7b29abcd81c95ddbb989a1ae9bdd88949af6931d2cb31153b5500
194 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Byju's learning app' and includes numerous embedded links. One critical heuristic indicates a malicious redirector link to 'ttraff.cc', suggesting the document is designed to redirect users to malicious content. The presence of a 'SE_ADVANCE_FEE_SCAM_LURE' heuristic further supports that this is likely an advance-fee fraud attempt, leveraging the embedded links to facilitate the scam.

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=byju%2527+s+learning+app+apk+file In PDF document text
    • http://xipovoti.lqblackpool.co.uk/uploads/1/3/1/3/131380349/xemovaxixami_puvitukefe_ramifopoji_fomobamaki.pdfIn PDF document text
    • http://files.nickdellis.com/uploads/1/3/0/9/130969735/75d7eff862836be.pdfIn PDF document text
    • http://xabob.antoniacundy.com/uploads/1/3/2/6/132695219/zemimonofeba.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/1/0433/4475/6901/files/36697550704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3909/5973/files/fajodabaforosuwafurika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/51215760686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/fonuratasekeruwabuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5122/1143/files/14756398954.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/judax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/90616245132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/ssc_result_2019_apps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/38453733473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/cours_d_espagnol_dbutant_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/63699043645.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00006316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6316 5392 bytes
SHA-256: edabbb5754e8ba31d1942216b85fc9f5b4871312e0a2c011d7fbd9dff7dda6a5
font_01_sfnt_off0000759a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759A 10444 bytes
SHA-256: 558be5550bc529a37a6299b2a3506fc38a11a26e7878c21bc98f534748f761e6
font_02_sfnt_off00009951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9951 16468 bytes
SHA-256: 1045d4f2d0039f7437e6ff6fa8358f2baf8422ee8b751cc30034a0c4a4da4026

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