Malicious PDF — malware analysis report

Static analysis result for SHA-256 55113d18d9f053b6…

MALICIOUS

PDF

56.8 KB Created: 2020-07-30 12:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94b05a0e6b9f3eb00e8708ec0838464d SHA-1: 678a8afc8aadf22e36d8f8a65c6c3f7730127841 SHA-256: 55113d18d9f053b6714813c8533fab7d9283976d1dce36e8abaa4b527c0c1f7e
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a search result for a calendar download. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the embedded URL is part of a known malicious redirector chain. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger effort to generate traffic through link farms. 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=kerala+kaumudi+malayalam+calendar+2020+pdf+free+download In PDF document text
    • http://files.clintoncountycasa.org/uploads/1/3/2/7/132740193/a58e93.pdfIn PDF document text
    • http://files.dmitriynurullayev.com/uploads/1/3/1/4/131438899/9719266.pdfIn PDF document text
    • http://files.honeycutthausshepherds.com/uploads/1/3/2/7/132740836/3453966.pdfIn PDF document text
    • http://files.smallbusinesscapitalus.com/uploads/1/3/1/6/131637723/xulifurokisuwe.pdfIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn 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/1/0428/5857/8086/files/rapugeguwivijufusol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/toreno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2434/files/18741889746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3489/4755/files/9651920139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/79677067972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0058/5632/files/fibiwofilepamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/xukagixibefuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/sosiwos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5486/6333/files/zusatulef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/zulelanevosawikiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2434/1400/files/81597848825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6099/3943/files/dabuvipodekufaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0124/9955/files/8534052209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/37977339765.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000905a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x905A 6728 bytes
SHA-256: 12c8b14e54a1102a7323e83da00008c357d6a4a3d4d3b18b54d69b402cf72af6
font_00_sfnt_off00007df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF7 5424 bytes
SHA-256: 69a36af572e7cbf319fbbb0b45623b1620b6b39e00cf601053f6baf3c9cebdcd
font_02_sfnt_off0000a8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AC 14332 bytes
SHA-256: 5c2c4519d00f4aebf22f8e27471c7420f4305ee5763b52bd6742ca13fbb0c09d

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