Malicious PDF — malware analysis report

Static analysis result for SHA-256 338a17780e059d97…

MALICIOUS

PDF

38.9 KB Created: 2020-08-11 15:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99b9d71a837ddcde3d47ab23c0499ed5 SHA-1: 464a5815c55552af17bf164a83dc52a3dbccb251 SHA-256: 338a17780e059d978a441729797f815cadb92d7ebe4207e289f57ce4fa5e2757
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting the intent is to redirect the user to malicious infrastructure. The presence of multiple Shopify-hosted PDF links, some with benign content, is a common tactic to mask the malicious 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.cc/pify?keyword=types+of+interest+rate+derivatives+pdf In PDF document text
    • http://files.quadrysteria.com/uploads/1/3/1/4/131453990/8323f8753bab9.pdfIn PDF document text
    • http://ratip.adventuroushabits.com/uploads/1/3/0/7/130776885/sezetuma.pdfIn PDF document text
    • http://files.isleinterpret.com/uploads/1/3/1/4/131437515/b6cb6.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/1/0427/7341/4055/files/88353602622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4547/6762/files/22549071827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8664/1304/files/roblox_gun_script.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0449/3987/files/25388445708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/soal_aritmatika_sosial_kelas_7_kurikulum_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3739/3049/files/statistical_significance_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38692385895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9964/4314/files/chylous_fistula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3465/6423/files/vupuruloxojatibunowex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3838/3007/files/mefeloxuvetala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/circular_motion_ppt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5302/1334/files/41329401355.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 4

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_off00005cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB6 5116 bytes
SHA-256: 2b6a231bee55ae42d800d418aeb25d60e83e5218230cf9e64b646c6efdfa26d4
font_01_sfnt_off00006e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E32 9580 bytes
SHA-256: b2e4c61d77249adddac797a66326e34d22387c0d438d3d584591607f9243c0d1

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