Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba74ac8fe1cf6841…

MALICIOUS

PDF

45.6 KB Created: 2020-08-15 04:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44667cca3096ac18f87bb3c9ad1264a6 SHA-1: 438dcc5bad7fab6949e0db735882455b58ce6cf2 SHA-256: ba74ac8fe1cf68413306bd2cef14a6e475223e61c0accb34371beaa94508fc8b
194 Risk Score

Malware Insights

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

The PDF document contains a deceptive lure, presenting itself as an answer key for 'Pu cet pg 2019'. It embeds a large number of links, including one to a known malicious redirector at `ttraff.com`. This redirector likely leads to further malicious content or exploits. The document's primary function appears to be driving traffic to this malicious infrastructure through social engineering.

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=pu+cet+pg+2019+answer+key In PDF document text
    • http://files.tanjazapolski.com/uploads/1/3/0/7/130776049/woduwepo_peneminivevabab.pdfIn PDF document text
    • http://zetera.nikolebethea.com/uploads/1/3/1/6/131637136/4658697.pdfIn PDF document text
    • http://files.collectivesociety.com/uploads/1/3/1/3/131379290/9a91d2c.pdfIn PDF document text
    • http://files.primaryds.com/uploads/1/3/1/4/131406610/vewozopune.pdfIn PDF document text
    • http://files.flexfitnessandrehab.com/uploads/1/3/0/7/130739892/bae45.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/1/0429/7824/6815/files/jewuzilufekazatabixuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5157/3657/files/mepafevunomarinalaxupuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/vuvutewawuzatejefaxigojab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/28684741462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1325/0972/files/el_aprendiz_de_brujo_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6295/1062/files/medical_dictionary_free_download_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9717/0847/files/zimikebotixegovab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/variance_analysis_actual_vs_budget_with_explanation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3016/7202/files/5176461621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/carcinoma_de_clulas_escamosas_da_pele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/jisomobijojelamezogupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9448/1823/files/pakonejub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/54954714126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/american_english_file_4.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000729e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729E 5808 bytes
SHA-256: a809518664f3633201eb00f1c5f7abc73e0e2a6d0e3cf858fded1f14ae67ca4f
font_01_sfnt_off0000868f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868F 10388 bytes
SHA-256: 587ed4969240792cd20da37d693fc934e15b43be69a66952facf86d03baad951