Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1575c93ed85b74…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 17:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f688e94544154df8a5ba29e7ec2e7ba9 SHA-1: dcafd837ecfc7a9f6575954ce623b1de69320a73 SHA-256: 4a1575c93ed85b7425a8d6dac26ea041e47c7428d066289de0c59632af40abcd
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF document contains a lure related to 'Skype for business 2015 administrative tools' and includes a critical heuristic firing for a malicious redirector link. The document body, though partially corrupted, contains the malicious URL and several other embedded URLs, some of which are hosted on Shopify. The primary malicious URL, https://ttraff.cc/pify?keyword=skype+for+business+2015+administrative+tools, is likely used to redirect the user to a malicious site. Another critical heuristic indicates a PDF link farm, suggesting a broad distribution attempt.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=skype+for+business+2015+administrative+tools In PDF document text
    • http://nemuxara.sustainablesonomacounty.org/uploads/1/3/1/4/131407552/9920133.pdfIn PDF document text
    • http://files.mumbisdesigns.com/uploads/1/3/1/4/131455956/1aa818e155bc84.pdfIn PDF document text
    • http://files.oace.co/uploads/1/3/1/3/131381781/parotakime.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/1/0430/1871/5289/files/27421872130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6027/4087/files/tidamolojigijabekuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7993/3862/files/bottom_sheet_behavior_react_native.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2607/8106/files/the_earth_s_layers_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8893/6102/files/fiwoduloket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/72588391482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/davin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9136/0934/files/73279675499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/rifojenebib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6093/7383/files/backup_software_for_windows_10.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C6 6108 bytes
SHA-256: aedd32fa3e01431a66740ef32a31f664ee2fdd516c462ab3f3acb6f4f7eee30e
font_01_sfnt_off0000778b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x778B 9576 bytes
SHA-256: 46f118675c7937e61e4aad90813a258bb9cc3b82b6cd1507b2fc0988f316c279

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