Malicious PDF — malware analysis report

Static analysis result for SHA-256 7611d5f855af4103…

MALICIOUS

PDF

43.2 KB Created: 2020-08-05 12:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31bd50a7257bd6758e5c6234b7d383cf SHA-1: 0225476489cc8955c46e7e2bffee8d07dec24857 SHA-256: 7611d5f855af4103c1ae0540348f70b9f1904c68fc1a59df31dd7da02d21967c
194 Risk Score

Malware Insights

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

The PDF contains a deceptive link disguised as a free book download, which redirects to a malicious URL. This URL is part of a link farm designed to attract traffic and potentially distribute further malware. The ML classifier strongly indicated maliciousness, and the embedded URLs are consistent with a phishing or social engineering lure.

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=basta+de+historias+andres+oppenheimer+pdf+descargar+gratis In PDF document text
    • http://files.csoboston.com/uploads/1/3/1/4/131452824/4592.pdfIn PDF document text
    • http://files.austinhighseniors.com/uploads/1/3/2/6/132681209/8363739.pdfIn PDF document text
    • http://files.wargamer-painter.com/uploads/1/3/2/7/132740214/986c5a9a.pdfIn PDF document text
    • http://files.technotronics.shop/uploads/1/3/1/4/131409498/035fd6c84d9b1.pdfIn PDF document text
    • http://files.invisiblecrownblog.com/uploads/1/3/2/6/132695813/2cf33254e7eaf0.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/1/0433/0687/7080/files/48880371243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/ragarebumufawexav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/73655388815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/vermont_renters_rebate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/kutamuzitapenugonifap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/mufamuravanaxedawiwuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/5590791483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/46440144901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9304/0029/files/nunuzodawesaliwojiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2629/2629/files/logrolling_definition_ap_gov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/lejinil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5789/7882/files/woselomelatunedow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9623/4400/files/9239271419.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 6

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_off000065bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 5588 bytes
SHA-256: 793921833ee2358813c22b91f77cf63513d383503250aa96cf26e5ddbd2ad120
font_01_sfnt_off00007897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7897 11316 bytes
SHA-256: 8861d40f7b64ca5578d0d9056e890048742a495c00a49fa5b75bbaf5eb2f2f73

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