Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3cb101b9924e03…

MALICIOUS

PDF

37.8 KB Created: 2020-07-23 14:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 930d07111c0ef5526669420365f067bd SHA-1: 8239255c2b01b14500ed6a2d0819c60ab92e3291 SHA-256: ba3cb101b9924e0342b7a1e1132eb852d1ace301769d76a84538f281bdb5a0ba
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, PDF_SEO_LINK_FARM suggests the document is part of a link farm designed to manipulate search engine results. The embedded document body text, though heavily obfuscated, contains keywords related to 'Thanksgiving worksheets for kindergarten pdf', likely a lure to entice users to click the malicious link.

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=thanksgiving+worksheets+for+kindergarten+pdf In PDF document text
    • http://files.cmhscheer.com/uploads/1/3/0/8/130814235/d1fe36e.pdfIn PDF document text
    • http://files.lewisrawlinson.com/uploads/1/3/1/4/131437503/vavupozuwime.pdfIn PDF document text
    • http://files.marycarolsullivanportfolio.com/uploads/1/3/1/8/131871658/mijad.pdfIn PDF document text
    • http://files.sciencetheearth.com/uploads/1/3/1/4/131453198/nunekezabori_fotazinipexubod_kuvadofug_kewilaz.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/1/0433/0687/7080/files/37278413385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7932/7141/files/bewesenopadigoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/davogemukerorikifawuzisij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/73501859951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8082/7558/files/xodonupazinabukopefosopix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1155/4980/files/98305478620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/nowikes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/juwufemomide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54729765263.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 7

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_off000058ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AB 5224 bytes
SHA-256: a38850155d3d781227675c8803e454c5d3a364404e9d5e43924dfd76f9fc663c
font_01_sfnt_off00006a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A72 9316 bytes
SHA-256: 3214f517fe2004245edc7bb95bd4610b42db478f061845ad6f52f9b56dd0989b

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