Malicious PDF — malware analysis report

Static analysis result for SHA-256 d415808bd0d59c35…

MALICIOUS

PDF

44.9 KB Created: 2020-08-08 14:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 46b5306bf7f8e198ba4805816e572260 SHA-1: 6f4cfe645e9510fca61e2b8d6173eda467eb7fc3 SHA-256: d415808bd0d59c3522a4ae372711824d48bfa34e52010746f268f01ea71bb77e
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=automotive%20hvac%20system%20pdf'. The document body, though heavily obfuscated, contains the same keyword and URL, reinforcing the lure. No scripts were extracted from this sample.

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.ru/wb?keyword=automotive%20hvac%20system%20pdf In PDF document text
    • http://files.guthealthconsultancy.com/uploads/1/3/2/6/132695329/jivapazeranajinoxexu.pdfIn PDF document text
    • http://files.nymeria-uk.com/uploads/1/3/1/3/131380345/wijij-dajevaripodaji-gitilikejiv-padom.pdfIn PDF document text
    • http://files.beckymarshmusic.com/uploads/1/3/0/7/130775084/8903915.pdfIn PDF document text
    • http://files.sunnyhillstennisclub.org/uploads/1/3/2/7/132740764/jetolo.pdfIn PDF document text
    • http://files.obedcofcc.com/uploads/1/3/1/6/131606011/bivujarokanirenafupe.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/1/0432/9065/6924/files/jorok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1124/3164/files/58603771693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9315/5235/files/sefijevatafelirikabiso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/97868216226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8494/6333/files/49556590562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1277/6351/files/lumipijurovofudukovap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0713/8201/files/apache_camel_developer_s_cookbook_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/13946435275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/57322954339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4930/files/79358946009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3671/2861/files/81749590676.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_off00007031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7031 5420 bytes
SHA-256: c99a525f11b43fe4b30989a58acd643627e66c4b18f2ee8ed368d758a1dbcdc1
font_01_sfnt_off0000828e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828E 10648 bytes
SHA-256: 6bdd7c53dc8d7bcde603c555ecb0245a336d43d576301d5de29cb7d9382e2881

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