Malicious PDF — malware analysis report

Static analysis result for SHA-256 3739b868f83a82f1…

MALICIOUS

PDF

40.5 KB Created: 2020-08-28 09:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 06e92fc29b1660e3c26f62d86c6f53ea SHA-1: 33be4d820b0bba02e5f3b3b8312ddd690ec29df3 SHA-256: 3739b868f83a82f1ffa471795ad0378b590d3b17fdf0d331f2e586f955de3e81
202 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though partially corrupted, contains text suggesting a lure related to 'Guia conamat bachillerato 2018 pdf' and includes the malicious redirector URL. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/pify?keyword=guia+conamat+bachillerato+2018+pdf In PDF document text
    • http://files.bronzedoklahoma.com/uploads/1/3/2/6/132681409/belasoj-vabuvakedaj-viwesev-xikexabetewe.pdfIn PDF document text
    • http://files.annapicklesharvey.com/uploads/1/3/0/7/130775590/6139294.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/1/0433/8886/2614/files/tomijilifoguwegelavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/54082970509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/bibixoxadamagoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9046/9283/files/a._p._cinemas_regulation_rules_1970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2251/5351/files/cestina_express_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/5878159817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/debaronozolomesolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikosimuzewenox.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000487f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x487F 5908 bytes
SHA-256: 6010de6abacac11b7ecfca6d8168462408a17c9036686357319d12bae6302368
font_01_sfnt_off00005c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C72 10608 bytes
SHA-256: ef5a53e79e3ce5badcf7205f354437d072ef0e363431954816f42c76051fb2cd
font_02_sfnt_off00007fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE3 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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