Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16d6f64f32eb264…

MALICIOUS

PDF

47.4 KB Created: 2020-07-31 05:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e7e1f557681b96810bb12517236ebce SHA-1: c0442dfaef802a7a961f4d29bc475df83b1c4cdf SHA-256: b16d6f64f32eb264ca1ce9cb3af14c74a91f119d976fbf40fb94aeebf31f8fec
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a 'PDF link farm'. One of these links, 'https://ttraff.cc/pify?keyword=cancer+de+cervix+y+embarazo+pdf', is flagged as a malicious redirector. The document body is heavily obfuscated, preventing a clear understanding of its intended lure, but the presence of the link farm and malicious redirector strongly suggests an attempt to drive traffic to malicious sites.

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+cervix+y+embarazo+pdf In PDF document text
    • http://files.whistlingwingshrc.com/uploads/1/3/0/7/130775021/jidivafipe.pdfIn PDF document text
    • http://files.ayurvedabarcelona.eu/uploads/1/3/1/4/131408169/muxoxu.pdfIn PDF document text
    • http://files.nextmanager.net/uploads/1/3/2/3/132302780/f006aa8.pdfIn PDF document text
    • http://files.zanyunoodles.com/uploads/1/3/0/7/130739381/sikete-wemotuta.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/1/0432/7122/5502/files/67082715619.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/73818092856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/8374852423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/katonativa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/jozojibos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/vobejewifijisugubanafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2112/2208/files/82657639005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/sovapigute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4385/files/98072149272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8741/0840/files/woroxiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/45169653221.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
    • https://medlineplus.gov/spanish/cervicalcancer.htmlIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 5240 bytes
SHA-256: 7d95b15a6a266a588d236377df97944e1184fcdc2a7c8f2b11ec38a8eeaff7b7
font_01_sfnt_off00008a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A23 11072 bytes
SHA-256: b678e414613e339ec602207d5e8725d484e01751c9779e52fa566d8accf58c13

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