Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27e475de67d51bb…

MALICIOUS

PDF

49.5 KB Created: 2020-08-09 16:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d514ca3c0b0bfcd76f7741dc07822330 SHA-1: a2935fff4c23f6bbecce038ec96ee306c12d159f SHA-256: b27e475de67d51bb1d356b966149eed2539955678934b97dad28ba7d650264f6
214 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, suggesting an attempt to drive traffic to malicious infrastructure. The document body, though corrupted, contains text related to lease contracts and URLs, consistent with a lure. The presence of a malicious redirector link and a link farm indicates the primary goal is likely to lead the user to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=national+apartment+association+apartment+lease+contract+pdf In PDF document text
    • http://files.hatterasarchives.com/uploads/1/3/2/8/132814024/700639a.pdfIn PDF document text
    • http://files.kissthefrog.ca/uploads/1/3/2/6/132682892/rojusipumo.pdfIn PDF document text
    • http://movonuge.st-bernard.org/uploads/1/3/1/3/131398560/46f8c2ef7f7.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/1/0429/7133/2767/files/92888737439.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/tijijajajir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1909/8522/files/62000817497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9009/1940/files/peviwetota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/2020_oscar_winners_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/89991855023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1367/5930/files/jdk_1._8._0_181_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/67700513545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/55983541937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/wulijujet.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 4

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_off000081c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C5 5268 bytes
SHA-256: 6e123434d72152528baff442a5c99b1232e39255f0cbad03e9924e30e5796590
font_01_sfnt_off000093a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 10952 bytes
SHA-256: 4b0e3edccdbe4c0eaf336ebcc4277fbf2d395ea40472f6005343c1a162dcb5f0

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