Malicious PDF — malware analysis report

Static analysis result for SHA-256 171e36dd599adb64…

MALICIOUS

PDF

47.5 KB Created: 2020-08-01 06:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03c1f1db70e5cf4d451fde9d31489908 SHA-1: d5a3f9436e0974e812654aeb32ad4da9824ee751 SHA-256: 171e36dd599adb6431169080c77ba09f4e015cfd2305ae21d20386cb9577b916
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links that lead to a redirector service, which is a common tactic for distributing malware or phishing content. The document body, though heavily obfuscated, contains a URL that appears to be a lure for installing a GitHub bot, likely a pretext for malicious activity. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites.

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=how+to+install+github+bot+to+discord In PDF document text
    • http://files.kchristianson.com/uploads/1/3/0/9/130969746/5803694.pdfIn PDF document text
    • http://files.schillingerbassoon.com/uploads/1/3/2/7/132710678/48b7f3e8859.pdfIn PDF document text
    • http://files.guardianwildlifeservices.com/uploads/1/3/1/4/131438137/22022fa4f0e09.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/12243957621.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/tiropuwunarevigagebok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/16136954889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5715/1129/files/42876941722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8102/4159/files/87255707321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5065/5129/files/lomutime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/wexolusiwatug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/35527027630.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4931/1646/files/47308015135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7834/4085/files/datug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupesuditijativerawepafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3093/7751/files/puwivuxeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1701/7243/files/kurugufelolorululogixikod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3637/6231/files/xuguliribowewikekaj.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A2 5160 bytes
SHA-256: 878bcbca8d3f733d46dd5fead6138bf156133906e0c00f469e6c5dc689744c00
font_01_sfnt_off00006522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6522 12528 bytes
SHA-256: 456bc4bebad52c6a51e2b14e756318b55c221bace64cd0b0f90d28e7597fc2ef
font_02_sfnt_off00008d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D71 16164 bytes
SHA-256: d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44
font_03_sfnt_off0000a26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA26D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3