Malicious PDF — malware analysis report

Static analysis result for SHA-256 0826997e17439481…

MALICIOUS

PDF

45.6 KB Created: 2020-08-05 11:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f4a68503fa931a8c1ac057315d28adc9 SHA-1: b57c1a66ddde543117863fa16e3af6605a17422f SHA-256: 0826997e17439481c569ca2f8e077d2453ac272f14cf492ec1b73b650088d299
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, https://ttraff.cc/pify?keyword=cancer+de+colon+pdf+fisiopatologia, is flagged as malicious and likely serves as a lure for phishing or malware distribution. The document body, though heavily obfuscated, contains this same redirector URL, indicating its central role in the attack. The ML classifier strongly supports the malicious verdict.

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=cancer+de+colon+pdf+fisiopatologia In PDF document text
    • http://files.elbeephotography.com/uploads/1/3/2/7/132740763/6dca1cada7f.pdfIn PDF document text
    • http://files.zulal.org/uploads/1/3/1/8/131871556/5781287.pdfIn PDF document text
    • http://files.battlefield4.org/uploads/1/3/2/6/132682882/934164c88c.pdfIn PDF document text
    • http://files.childrensartlab.com/uploads/1/3/0/7/130738548/rizaperibuniwevapame.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/1/0433/0687/7080/files/63016720996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/55195319911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/81853523773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1886/0190/files/24497633729.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/49547870916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/wonulin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0831/9907/files/tafojejubirekaraw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/30927569320.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3242/0262/files/86691066444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5495/6695/files/19126079994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/61304793361.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 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_off00006731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6731 5132 bytes
SHA-256: af093130cb7ae57d3e6e801796a791fd2944ff5244d32255f4a9f8f7c5109d2c
font_01_sfnt_off000078b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B1 10076 bytes
SHA-256: 73488c328bedab86849870837154c206aa8d524ace01f099f3542481f8adc381
font_02_sfnt_off00009b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B07 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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