Malicious PDF — malware analysis report

Static analysis result for SHA-256 781f0d7ecf3d5188…

MALICIOUS

PDF

44.8 KB Created: 2020-08-11 08:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd8e761fc2c88d62831c46ea51b7e851 SHA-1: 38002c079617c4bb68266f0f95b096b6474e86a1 SHA-256: 781f0d7ecf3d5188ecdd71448ec430634874c85a63012e72fedfb52e084a2ab2
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector infrastructure known for malicious activity. The document body itself contains the malicious URL and numerous benign-looking links, suggesting a link farm or phishing lure. The ML classifier also strongly indicated maliciousness.

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=pengertian+media+audio+visual+pdf In PDF document text
    • http://files.annielawson.com/uploads/1/3/1/3/131383384/tufubofekezef.pdfIn PDF document text
    • http://files.rethanksaz.com/uploads/1/3/0/8/130813770/kutim_fevegu_zifufajewubu.pdfIn PDF document text
    • http://tudonawi.slamproject.org/uploads/1/3/2/6/132680813/c400b801158e.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/1/0431/6826/8456/files/kingdoms_of_amalur_reckoning_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5114/6649/files/38345221529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5023/6054/files/wefenafowojon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4578/9606/files/maths_differentiation_formulas_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6237/6101/files/monografia_de_auditoria_financiera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/83111094505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7913/0524/files/zejupuxufuxifilubopuzafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5372/7394/files/39910664968.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/7016/5916/files/file_in_jpg_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/xevitugijavob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/7615823031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5563/5880/files/jurnal_gangguan_afektif_bipolar.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 5

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_off00007286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7286 5424 bytes
SHA-256: dff8b206bf9eb2c21be0402ba5d22c8baee87bc8f12ce90f42ccb5f8b9fa02b1
font_01_sfnt_off000084e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E4 9860 bytes
SHA-256: 596ebbc61db6eb0001f976d2fa2ebbb243f33b4f84645e06783c60c13589395a

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