Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5590c30356dcf08…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 14:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 244d9184672774f5783176853b927dcf SHA-1: 6d6d0e80316b16147c8c74e9340a9674dd990c1c SHA-256: e5590c30356dcf0893d31867a0aaac0f3e85936602d24495cabeff1f089b4d1f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to file conversion and a URL that appears to be part of a link farm designed to attract search engine traffic. The presence of a malicious redirector link and the link farm structure strongly suggest a lure to download further malicious content or engage in phishing. 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.com/wb?keyword=cara%20convert%20microsoft%20word%202007%20ke%20pdf In PDF document text
    • http://kojeremof.hanshen-sg.com/uploads/1/3/1/3/131398020/06a5ab04aa.pdfIn PDF document text
    • http://files.sbrfln.com/uploads/1/3/1/4/131453193/lemujozuros.pdfIn PDF document text
    • http://files.momento.ie/uploads/1/3/0/7/130739060/lutalikaxa_fukimiziru_siwupipibose_vewatenux.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/1/0434/5780/6503/files/baposofixukejudag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4558/7877/files/agenda_semanal_2020_para_imprimir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/70252885859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1246/4550/files/writing_effective_business_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/account_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5195/8947/files/75594134636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/vakewazowax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/66484362083.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/dilino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5104/9370/files/84967098222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7853/9671/files/grade_2_phonics_test.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 3

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_off000062d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 5744 bytes
SHA-256: 156a88eb597f82ed6307442dff1a19c018275fb8800204a63b77493ec3fa594e
font_01_sfnt_off0000766a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766A 10436 bytes
SHA-256: b3579b23c45ef1fb2425cf5c78ad77de5df4541932983b0bf6c51ededb7be146

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