Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ad774a1742492c…

MALICIOUS

PDF

40.9 KB Created: 2020-08-01 10:15:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 664cef0a7ca66bffe7aa3fba6352d892 SHA-1: e151ef2730e6a73cce3210de38402858c67ed719 SHA-256: 45ad774a1742492c731dfab277f15982d42f4802fe339ec4a8ad5c13cca0e692
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. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=navien+npe+240a+manual'. This suggests the document is part of a link farm or SEO poisoning campaign designed to direct users to malicious infrastructure. 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/pify?keyword=navien+npe+240a+manual In PDF document text
    • http://files.highgearcoaching.com/uploads/1/3/1/4/131453818/4490914.pdfIn PDF document text
    • http://files.nccrabbingandshrimping.com/uploads/1/3/0/7/130776008/4077c03bc876a.pdfIn PDF document text
    • http://files.agorapublications.net/uploads/1/3/2/6/132682570/4da5af8.pdfIn PDF document text
    • http://files.healthyconceptsmb.org/uploads/1/3/1/6/131606668/1171341.pdfIn PDF document text
    • http://files.colindecio.com/uploads/1/3/0/7/130775001/363155.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/1/0432/5461/2123/files/noposugopowomeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/20258657298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/kegipigopoboxusebetoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2881/4746/files/25592290030.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1306/8184/files/moxovofiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/rizedabixasovomekimuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/5383417525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/66571426185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/82053167973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/nebolumowen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/19434564416.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_off0000614a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614A 5084 bytes
SHA-256: 0d161cb30866ae9b6ca34596163805cf05e3d9dfdfea22d2f9ef8fe49399e4ce
font_01_sfnt_off0000729f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 10756 bytes
SHA-256: 4d885f359d987aaf2ee4d8abfe592f644caa343edf72d266111f70756be4d815

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