Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8440c2d264e424…

MALICIOUS

PDF

34.7 KB Created: 2020-08-17 02:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6d8ee3602be2bb5a0f4452cb7d227ea7 SHA-1: 99f9f8f1e9994e4e23c0b41addc1e55613592687 SHA-256: 4f8440c2d264e4241e30719f0f7802f508e90aa4e871968a1e2b969f9b904463
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though garbled, contains text related to 'Autumn leaves piano sheet music', suggesting a lure to disguise the malicious intent. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing page or malware download.

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=autumn+leaves+piano+sheet+music+eva+cassidy In PDF document text
    • http://files.stmarks-benson.com/uploads/1/3/1/6/131636866/7e15335.pdfIn PDF document text
    • http://files.tigerunstrong.com/uploads/1/3/1/4/131453456/6982004.pdfIn PDF document text
    • http://files.sunsolutionsolar.com/uploads/1/3/1/6/131637896/930774e95.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/1/0433/2732/4310/files/52002546558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/hp_elitedesk_800_g1_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9284/4448/files/woxuzaromijoxaxelufunix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7029/9048/files/el_ser_humano_como_ser_biopsicosocial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/14864436974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1561/8215/files/gofagidutilajokuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/8750/8135/files/all_android_mobile_secret_codes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/80298716354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4386/4228/files/56245830174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/telugu_movies_free_2018_utorrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/bar_billiards_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/38511910091.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6284/8664/files/fibipofibabe.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
🗂 Part of campaign: stmarks-benson.com 6 samples

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_off000049b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B7 5368 bytes
SHA-256: d8e23956c2b2a1a16a6142d61b5315faf9a5969b72ba9d77a197081457cea275
font_01_sfnt_off00005bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDB 9824 bytes
SHA-256: aa3b23fb2521992b566f1b494ea7a7dce5d247c30507b3646bf320c12b0a6abb

Open this report in the interactive analyzer, or submit your own file for analysis.