Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4c4844dc54a9bae…

MALICIOUS

PDF

46.5 KB Created: 2020-08-10 15:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 946425e971ba2f982e61f6525582a3f5 SHA-1: 2330cc6d5827d5bcb68e1c64580e9d4422e74482 SHA-256: c4c4844dc54a9bae8fc26dbf98b5fae0415f523bde6f99a1daca2a2af3f83a98
194 Risk Score

Malware Insights

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

The PDF document contains a mass link farm, with a primary embedded link redirecting to malicious infrastructure. The document body text, though obfuscated, contains the URL https://ttraff.cc/pify?keyword=analisis+estadistico+definicion+pdf, which is flagged as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites by disguising the link as a benign document title.

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=analisis+estadistico+definicion+pdf In PDF document text
    • http://files.stallaureas.com/uploads/1/3/2/6/132681415/peviwatifugetovud.pdfIn PDF document text
    • http://files.paprince.com/uploads/1/3/0/9/130969045/befiduxajug.pdfIn PDF document text
    • http://sejesu.alamodekabashsewingshop.com/uploads/1/3/0/7/130740049/guviruge-nuzug-xatere.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/1/0430/5921/6537/files/makalah_sejarah_dinasti_abbasiyah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/56320893158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8330/8955/files/welokomasop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/gesufesuzukuja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/7878/0837/files/periodic_table_gcse_aqa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/susolesaxazad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/4764338826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/8896640362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/likisufozilirawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/7th_grade_mathematics_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7773/0464/files/59114547616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/59630554063.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 3

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_off000075c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C3 5040 bytes
SHA-256: 9f5f61ead284319e79b681c9bdf303efdd4cb741280bcefcbe8b3ddc8137747c
font_01_sfnt_off000086f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F7 11296 bytes
SHA-256: 7cb33f38cdb54b870cecf0a0446a57a53d2a2978fa5acaec9f4b1114d4f9f595

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