Malicious PDF — malware analysis report

Static analysis result for SHA-256 20899b6b7864422e…

MALICIOUS

PDF

43.4 KB Created: 2020-08-24 04:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 85fbd5c8fad30486e115e26d553b82ac SHA-1: f4c3a408d99b182d14862e84865f96cd58794613 SHA-256: 20899b6b7864422e4de7490a2c9e8454d88b722a431f28d49618853df46be00d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text and embedded links suggest a lure for a calendar template, which is a common social engineering tactic. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute malicious content. The primary malicious IOC is the redirector URL.

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=free+printable+calendar+template+march+2018 In PDF document text
    • http://kaxawelut.geraldtalks.com/uploads/1/3/2/6/132682587/9479186.pdfIn PDF document text
    • http://pofadiva.jwhitneyart.com/uploads/1/3/0/7/130775565/2726583.pdfIn PDF document text
    • http://files.cathyscommuniondresses.com/uploads/1/3/0/8/130814466/6147770.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/1/0430/9427/8293/files/46442601162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/18500988667.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/68427237323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3849/8198/files/87513850324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1388/8424/files/52049320965.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/zasojegatojojewemekek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3206/7748/files/16526712999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/cancer_treatment_protocols.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/zimuninutuvogamagowogil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6528/6564/files/lajejebepibegalamasusuru.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_off000069ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FF 5748 bytes
SHA-256: 08e5747c0dbec29276a8ef4745ec7064e46c380b0a4d5952c80c8b6980519570
font_01_sfnt_off00007d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D54 10352 bytes
SHA-256: 0d3da4d81c9f9d871a6b9fe33071a047d10ea1f926c64e85a4805b625d3944a0

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