Malicious PDF — malware analysis report

Static analysis result for SHA-256 a593a62c5485a6ce…

MALICIOUS

PDF

80.9 KB Created: 2020-08-05 17:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 742d24ca11294e7eef4996558e014e5f SHA-1: ec37c14b8d1d92402124fde52b592ec6be85dd8d SHA-256: a593a62c5485a6ce7732fd18dfcee0c464e9419187a8cc0c7e0a31426cc297cd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link pointing to ttraff.cc, which is known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Makerere university fees structure 2020 17 pdf', suggesting a lure. The primary malicious URL is https://ttraff.cc/pify?keyword=makerere+university+fees+structure+2020+17+pdf, which likely leads to further malicious 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.cc/pify?keyword=makerere+university+fees+structure+2020+17+pdf In PDF document text
    • http://files.updatescentral.com/uploads/1/3/1/3/131384018/fotimiva_nidanu_gibuvidedavade.pdfIn PDF document text
    • http://files.northpointemed.com/uploads/1/3/0/7/130776592/1222042.pdfIn PDF document text
    • http://files.freemaninsure.com/uploads/1/3/0/8/130874324/sosowor_peresixosixar_rejerugovije.pdfIn PDF document text
    • http://files.northwindhamunionchurch.org/uploads/1/3/2/7/132712006/zobav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3680/1184/files/62828868648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/petametabor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/sexefasuvudop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5555/3432/files/5271807504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/golitazokudibisegiguv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7697/4747/files/58626003711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2683/3823/files/fulilidafupuwajepekako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9892/2392/files/85534958787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/briggs_and_stratton_parts_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/kilisusom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/32248715392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30106301206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bebupikisanomagidilu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B9 5528 bytes
SHA-256: 8cb41cc4eaf3b8a061bf89dea537b2b49e2800c09f4ed1471f5ed451ca8ff755
font_01_sfnt_off0000f3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B2 16952 bytes
SHA-256: b599562d412a8f7b68fc1ded596b3f360e03c7b5b06b6a38b1f134660c5632d2
font_02_sfnt_off000127a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378