Malicious PDF — malware analysis report

Static analysis result for SHA-256 d353756bdad358ce…

MALICIOUS

PDF

70.6 KB Created: 2020-08-08 02:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c3d1bd0bf472404f38825570ccd7e21 SHA-1: 94840a22778b202755aa708460419c28f2bd4884 SHA-256: d353756bdad358ce3bdf96523e5d210615dc1a4c868b4d604ca3dfa7b1215e30
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of these links, https://ttraff.ru/wb?keyword=environmental%20pollution%20by%20heavy%20metals%20pdf, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=environmental%20pollution%20by%20heavy%20metals%20pdf In PDF document text
    • http://files.sweetstreet.info/uploads/1/3/1/4/131407469/7555571.pdfIn PDF document text
    • http://kujesonef.hellohapa.com/uploads/1/3/0/7/130739024/2132708.pdfIn PDF document text
    • http://files.worthit.productions/uploads/1/3/0/8/130813528/8788032.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/1/0428/9835/8432/files/tiwimuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78649322563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4815/5806/files/anlise_combinatria_e_probabilidade_enem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3010/7544/files/fubumijejikozomoniganujun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/61680821750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8770/8825/files/iit_jee_organic_chemistry_notes_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/36941146723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/vegoguramujiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/32877816771.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC293 5540 bytes
SHA-256: d35a46229cef1646c6cc1f7d38b760273ce7a0f59d6b5f546dc52cb28903373c
font_01_sfnt_off0000d53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53F 10364 bytes
SHA-256: 23cd5a602c04a87c5e18cbe1a1fe9e4a490c52bc22b6b7a090f27c87007bb569
font_02_sfnt_off0000f8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C7 16080 bytes
SHA-256: e8a2a40c81204f68d188656ee186563bb41cec9665ac8bf1c139965098426a80

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