Malicious PDF — malware analysis report

Static analysis result for SHA-256 9deb288da0fc8929…

MALICIOUS

PDF

32.8 KB Created: 2020-08-13 18:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e59828022c2c7ba25e48007dbe250516 SHA-1: 0cfb38595e3e47427476e3677aa977c8be619ee5 SHA-256: 9deb288da0fc89299bb75e7f26ba7f2a497776bdc0fd8c884a1f1154e343dbcb
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as installation instructions, aiming to lure users to a malicious site. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF links, likely part of a link farm to improve search engine ranking for malicious content.

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=shower%20screen%20installation%20pdf In PDF document text
    • http://kivolo.fredoniapubliclibrary.org/uploads/1/3/2/8/132814930/wajudiwozipinibofigi.pdfIn PDF document text
    • http://files.juwhan.com/uploads/1/3/0/8/130873795/mofosatarikagan_najubo_sixebop_nexenanikitixo.pdfIn PDF document text
    • http://files.shipleyartstudio.org/uploads/1/3/1/8/131856288/gerumumovaxoli.pdfIn PDF document text
    • http://files.drmrosenfeld.com/uploads/1/3/0/7/130776399/7981372af70.pdfIn PDF document text
    • http://files.alohavolleyball.com/uploads/1/3/0/8/130874588/1088443.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/1/0432/9360/6048/files/california_air_tools_5510se.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9430/1085/files/after_we_collided_download_wordpress.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0140/4830/files/mikutasenazukafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/30753668196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/abbott_vertigo_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/gapufezujakuvolegekira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0865/4492/files/supercritical_boiler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7960/6176/files/cazadora_de_hadas_3_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5483/3564/files/sagapolakajij.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_off000045d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45D1 5440 bytes
SHA-256: 41d792351c3688df0b5bb679c1c6810ee0ce9cf48919bd6eb7c38dc877c54ebe
font_01_sfnt_off00005851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5851 8812 bytes
SHA-256: c92821797ba3575ca8ac3ad179a0922a2e65f8c290cf963220a33df366ead99d

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