Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba1ad6a34309164…

MALICIOUS

PDF

36.9 KB Created: 2020-08-18 17:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 15bdc6e876dcd1bffcf5a4a775cc9658 SHA-1: 4edd07b6177c2499a374a874b35af802483ba881 SHA-256: bba1ad6a34309164a5be04dc8d70b7f7bad779df1c089ad5e7b0071ddbc5ee57
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed to lure users with a seemingly innocuous topic like 'handwriting practice sheets'. The primary URL, https://ttraff.cc/pify?keyword=handwriting+practice+sheets+for+grade+2, is identified as a malicious redirector. The document body also contains numerous links to PDF files hosted on Shopify, likely part of an SEO link farm to improve search engine ranking for the malicious redirector.

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.cc/pify?keyword=handwriting+practice+sheets+for+grade+2 In PDF document text
    • http://files.blackwoodforsheriff.org/uploads/1/3/1/4/131483336/nagedilatelud.pdfIn PDF document text
    • http://fipagemi.rezabekvineyards.com/uploads/1/3/0/8/130874104/lopunedemowigoturomi.pdfIn PDF document text
    • http://tivufugu.libertylawgroupla.com/uploads/1/3/1/4/131407089/2452239.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/1/0435/8812/4831/files/public_relations_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8819/1396/files/35969879419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/minuxuzelemolapiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/lejavanefaluke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2653/7883/files/instagram_no_modo_noturno_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5161/4359/files/42411242538.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4532/9832/files/2235069342.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 1

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_off00005065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5065 5568 bytes
SHA-256: 1ac349f86d65000549742195f70feceee33c7f0dc3b9002f3d44763799bb20ae
font_01_sfnt_off0000635f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x635F 10452 bytes
SHA-256: f4e9a99163cb2151da16aab9ece9ce14542b1706402a7406e934ad6498a8a894

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