Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a286f489426e4d…

MALICIOUS

PDF

101.1 KB Created: 2020-08-02 05:29:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 978fcd3f2129dc5b2cc6e47538c36bb2 SHA-1: 77a7e18178dc6a3f53973e8ec5a49c3f2ac4bb77 SHA-256: 88a286f489426e4dfa9648f47b57a85c64151e61d383a034e422039026e7bc0e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links designed to create an SEO link farm, redirecting users to a malicious domain. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.cc/pify?keyword=mirro+pressure+cooker+manual In PDF document text
    • http://files.si-ul.com/uploads/1/3/1/3/131379833/3804504.pdfIn PDF document text
    • http://files.jennyjohnstonteacher.com/uploads/1/3/0/8/130874110/jepuludena_futowiniteje_benilajipubuvul.pdfIn PDF document text
    • http://files.nachomamasbedandsnack.com/uploads/1/3/0/7/130776728/65e86d74f888a.pdfIn PDF document text
    • http://files.sharonceslak.com/uploads/1/3/1/4/131483307/xifepamudolebudi.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/1/0438/4777/8469/files/free_church_bulletin_covers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9659/5861/files/zoxebewalor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/naxoseziwiwamigizefib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/73184516711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6891/5863/files/newejulolutef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7987/6252/files/23637203803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8714/2819/files/22220483252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5548/9948/files/nalivobijalalutoxagaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/23335894072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/51886173571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/83864435277.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_off00014dc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC5 5148 bytes
SHA-256: f5c4c60701468bd0e457dcb5a02eec6ae7b9ab0b806035c318794a875a167040
font_01_sfnt_off00015f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F42 12240 bytes
SHA-256: 2d96650d7b46c9fadab7979e088f30f479e359fb5ef14b126e11f9b805528965

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