Malicious PDF — malware analysis report

Static analysis result for SHA-256 776a76a2f7399f49…

MALICIOUS

PDF

47.8 KB Created: 2020-08-06 04:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0731c5ce7cca00794d3f71b63c115014 SHA-1: a8f12d18a20f65cf34a03f6b9305ae2130a60fc7 SHA-256: 776a76a2f7399f492f2a5ed0dc4876d2207900fca9ef42fe76f1883e26f4d969
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed to lead users to a link farm. The embedded URL 'https://ttraff.cc/pify?keyword=benefits+of+shared+reading+pdf' is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'benefits of shared reading pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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=benefits+of+shared+reading+pdf In PDF document text
    • http://files.colhenryart.net/uploads/1/3/2/7/132712129/gisogoxebowuvu.pdfIn PDF document text
    • http://gujovese.greerunderwood.com/uploads/1/3/2/8/132815367/nigezenibetulofineg.pdfIn PDF document text
    • http://files.breakoutrunning.com/uploads/1/3/1/4/131438216/seleto.pdfIn PDF document text
    • http://files.staragricultureproducts.com/uploads/1/3/2/7/132740338/3741638.pdfIn PDF document text
    • http://files.studentslibraryproject.com/uploads/1/3/0/7/130775346/xatobununujuxe.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/1/0431/6354/9847/files/lugiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/45470548213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/zisumoziwenijonuzexakani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5167/9893/files/jutuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/uae_new_arbitration_law.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8351/2473/files/98955209755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0132/3420/files/10576923599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6812/9431/files/gujiwefagaveje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/mekanala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/fluticasone_salmeterol_davis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/rinorojaduvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/3843235761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6935/8758/files/operations_management_krajewski.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/neopets_wheel_of_knowledge.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 5320 bytes
SHA-256: 47321f6277199d76ea98630d9a3ad977bd0012cd7bc8d925bad32905ac70c4fb
font_01_sfnt_off00008d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D78 10672 bytes
SHA-256: 93ff57044dc54e8c56a2e9d5cd1121a14480e9fd3c0a770931bf730efd2ef185