Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ac90730f5e7b1d…

MALICIOUS

PDF

43.9 KB Created: 2020-07-31 08:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bdbed2d9bea766265b7a78fd406223ab SHA-1: 30fdd31044633d9c94fa8eacd98b742379b8aa39 SHA-256: 93ac90730f5e7b1d7ba7c64facace3891f0287e17adc98ddd9eab390b77dbe41
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'math worksheets for preschool pdf' and 'wkhtmltopdf', suggesting a lure. The presence of numerous Shopify URLs, while many are benign, indicates a strategy of distributing content through legitimate platforms to mask malicious links. The primary malicious IOC is the ttraff.ru 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.ru/pify?keyword=math+worksheets+for+preschool+pdf In PDF document text
    • http://files.worzzler.com/uploads/1/3/1/4/131409309/1248b52f.pdfIn PDF document text
    • http://files.sassafrashealingarts.com/uploads/1/3/1/3/131398250/matemebivopo-buzamizoz.pdfIn PDF document text
    • http://files.goldenretrieversofidaho.com/uploads/1/3/1/6/131636654/3802901.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/1/0437/3273/0008/files/7726167660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9845/4693/files/26287257679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/15659410242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8499/7017/files/najuzalesixededa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/redofev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/sesowafeximo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8521/files/manenajexafetogirajavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/32822249678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5512/7459/files/zajakepepolebubuwer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/nulowimafojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/zilarapurax.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_off00006e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E43 5036 bytes
SHA-256: 07ed5ab14c64cfbcbe4dc6c9ab28524697abddd06e284dab1de0a05656d89e13
font_01_sfnt_off00007f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F97 10084 bytes
SHA-256: 2edaa535d197f72f1cbdc01f8e55aedb5c369a4d27157e730f15755ebcfa4330

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