Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97996e68fc0cdb8…

MALICIOUS

PDF

44.0 KB Created: 2020-08-11 23:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 722353d0076068276e98c61c786636a3 SHA-1: b7342fd340af10f58d4eca0ec878cf9f1cfbd0d8 SHA-256: c97996e68fc0cdb8d67cb7b1a334b4977d5bbb3bf63e3432fb717bdb9d2cc504
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=maharashtra%20state%20board%20books%20download%20pdf'. This URL is presented within the document body, disguised as a link to download educational books. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious link is likely intended to redirect users to a phishing or malware distribution site.

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/wb?keyword=maharashtra%20state%20board%20books%20download%20pdf In PDF document text
    • http://files.clubeinternoscirurgiacardiaca.com/uploads/1/3/0/8/130874012/pisikuwewa_fusabiwakubigo_mikogeworoxed_redazatawedam.pdfIn PDF document text
    • http://xetobom.anselmianabbeyplayers.org/uploads/1/3/1/6/131606758/fuponameb-towiv-pomadalofuvelef-zaluze.pdfIn PDF document text
    • http://files.statedshowroom.com/uploads/1/3/1/3/131398547/dedido.pdfIn PDF document text
    • http://files.kannwoodtimberworks.com/uploads/1/3/0/8/130814861/sewobixono_witajufikul_wikuxale.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/1/0431/8003/2160/files/depuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/jurnal_tentang_alkali_dan_alkali_tanah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4371/5222/files/18045343315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/general_virology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8400/8862/files/ambient_air_pollution_and_biomarkers_of_health_effect.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2667/7913/files/95621850247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/tusalorajuligabale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9610/5375/files/kasado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9305/5904/files/75186590402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/puvapukexugevunil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/wasisikudenezuvoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4904/9499/files/34973177712.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA1 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off00006d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D95 5428 bytes
SHA-256: a1b1192d04dc0da3b7d8c6af6f75cae9c6e0c0cc018d3731489a17c15c8d7e03
font_02_sfnt_off00008015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8015 10012 bytes
SHA-256: 0ad5e4454b4949f1528a691407c240d3d378a4ad17e8ae8df4fff74b1dac3da0