Malicious PDF — malware analysis report

Static analysis result for SHA-256 312760871e8aea96…

MALICIOUS

PDF

59.4 KB Created: 2020-08-12 02:15:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d9cfcfcb3a97330a1ef9742bd65d0c6 SHA-1: f7cbe1958367fd9dbda156022488146a351fce72 SHA-256: 312760871e8aea9699875355dfce92613668a35e714674426e058c32b4aa7109
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text that appears to be a lure for a PDF related to accordion buttons, and includes the malicious redirector URL. The primary attack pattern involves redirecting the user to malicious infrastructure.

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=libro+de+acordeon+de+botones+pdf In PDF document text
    • http://bisedugud.anewleaf4you.com/uploads/1/3/2/6/132681947/jusipirerivisilip.pdfIn PDF document text
    • http://files.stclairslsc.org/uploads/1/3/0/8/130874524/zazaxekasovirugukew.pdfIn PDF document text
    • http://files.cepac.org.uk/uploads/1/3/1/4/131411281/5610327.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/1/0436/8960/7321/files/fixisuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2860038855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6743/1320/files/vipejeretos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/raburilefarebojitunin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/speedtest_server_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/riwilatok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3717/7494/files/academy_awards_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0034/6270/files/57699182717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9482/5376/files/28394728945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4139/7656/files/sesow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/calculus_briggs_cochran_solutions_manual_download.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_off00009dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD5 2828 bytes
SHA-256: dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21
font_01_sfnt_off0000a7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7CF 5200 bytes
SHA-256: 7ad5528de86e089d4cfe70c85500603ff61057d4ca580e925ba82f190ed5f903
font_02_sfnt_off0000b984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB984 11424 bytes
SHA-256: ef7c32c8d2a1a0c630c810ccab330530c6e3c5354ff7cdca926ff7524f054ca6

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