Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16368ef95788590…

MALICIOUS

PDF

36.9 KB Created: 2020-08-04 06:02:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f27d5dd0fc9d6fcef594ab3b1c7fbf3d SHA-1: 292796f74bd61c609413436abcd5f36486670382 SHA-256: b16368ef95788590e9039ae0b1d7936acec5f51163150b122f669276cf80f019
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure (ttraff.cc), and another noted a large external PDF link farm. While no scripts were extracted, the sheer volume of links, including one pointing to a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

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=adeste+fideles+chords+pdf In PDF document text
    • http://ridedatu.schaufinefarms.com/uploads/1/3/0/8/130874416/mizafevumizogunaje.pdfIn PDF document text
    • http://files.ohsband.org/uploads/1/3/0/7/130776542/8358367.pdfIn PDF document text
    • http://files.winghamprc.org/uploads/1/3/0/8/130814169/ff064c6a76.pdfIn PDF document text
    • http://pofutize.svetaeufemijasociety.com/uploads/1/3/2/6/132681504/96729f8da189cc.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/1/0434/4014/4534/files/20801493072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/46562518900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8542/1978/files/types_of_analog_to_digital_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5813/4168/files/kilabakufijejuvibosenos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/tudosajosewusalakuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9163/8934/files/jpeg_to_bmp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/limudurimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/97774921827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/kurez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2018/7805/files/nopugodanopeluxozan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/42209682511.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 6

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_off00004a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A38 5024 bytes
SHA-256: e96770920573ab58b2a52a5b856589beb662c9a0130ca74e62263b7fa019ddec
font_01_sfnt_off00005b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4C 13868 bytes
SHA-256: bd05ae5bf455aeb750919f4a104a4b0336ccf52c3914d6eec0b614350a4e6f45

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