Malicious PDF — malware analysis report

Static analysis result for SHA-256 23c05730dea0dd2f…

MALICIOUS

PDF

49.2 KB Created: 2020-08-27 19:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25dc0ee73ed79829d18c1511f74641f3 SHA-1: 4128c48fbfaaa4b6c7f3ccc4e8f25a57a7e9ba80 SHA-256: 23c05730dea0dd2fe198b7349a98ef76db5c7e88cd2bb38a651ba03069dd28a9
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a string that appears to be a URL, further supporting the malicious redirector finding. The presence of a link farm suggests an attempt to distribute malicious content or engage in SEO poisoning.

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=power+rangers+tabletop+rpg+pdf In PDF document text
    • http://files.peaceloveandpregnancy.com/uploads/1/3/1/4/131437724/759ee77e7.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/1/0431/4071/0562/files/2d_and_3d_shapes_worksheet_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1284/0862/files/jofedojorak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0728/5147/files/15160835423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/ibm_rational_appscan_tutorial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wajomuxufukurojudi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/assumptions_in_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/womuwoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4686/0960/files/john_deere_js40.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6112/5013/files/31747838915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/75430935197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6845/6086/files/wogugisabipivevel.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_off000076dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DC 5444 bytes
SHA-256: 72b6c7eab2fc313d8d2778783d5dc08fb025f4eb346aeee483c6982791eaabaf
font_01_sfnt_off00008971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8971 14928 bytes
SHA-256: af6d5bb727766e9648a757cac917db75ec70a43a7783258893abda953adcd0f2

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