Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b107c9357f79cb6…

MALICIOUS

PDF

42.7 KB Created: 2020-08-15 05:13:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f2ffd2c740a8398c97f5d8c13ac50bed SHA-1: d5d60d9a28f0651b8d4635a3f7073606145a7c0a SHA-256: 5b107c9357f79cb6c417c001b208f70c27e195af87e31d2bcc04cad288e1d22b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links that redirect to a malicious SEO link farm, identified by the URL 'https://ttraff.com/pify?keyword=free+worksheets+possessive+nouns'. This suggests a phishing or scam attempt, likely using the 'free worksheets' lure to entice clicks. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/pify?keyword=free+worksheets+possessive+nouns In PDF document text
    • http://files.stfrancesbasketball.com/uploads/1/3/0/7/130775102/3353682.pdfIn PDF document text
    • http://kigalep.jacquelyncarterdesigns.com/uploads/1/3/1/6/131637136/kivorogo.pdfIn PDF document text
    • http://files.soaringhawkvineyards.com/uploads/1/3/0/7/130775633/kalitetuwipe.pdfIn PDF document text
    • http://files.prodigyracingassociation.com/uploads/1/3/2/6/132681969/zezefi.pdfIn PDF document text
    • http://files.antlerspecialtygoods.com/uploads/1/3/1/4/131437306/wunog.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/1/0429/3813/8783/files/7967170765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/timothy_keller_counterfeit_gods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38967404473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/daxurenuxuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/58621221523.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7453/4041/files/absolute_value_graphing_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5940/4197/files/suzigojabavuwexewipamag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5058/2684/files/20358974742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8672/5795/files/5639983387.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_off000069e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E9 4836 bytes
SHA-256: 3ba43c8d9e877ccb522a9f292a8ac2c8d59eb797e6bbf2503f3cfbc8f90df819
font_01_sfnt_off00007a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 10456 bytes
SHA-256: fa84ef502bf3f6fa1eeb17952dbc610415eb820aa198e580c2cb2a2c34849010

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