Malicious PDF — malware analysis report

Static analysis result for SHA-256 8103a9f4e3f7a86e…

MALICIOUS

PDF

42.6 KB Created: 2020-08-22 19:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9bcd2e2e19897964c7432f5aaba9b380 SHA-1: 162bd057ccfa28e82b2c4391b241fe70f03a9f60 SHA-256: 8103a9f4e3f7a86e52b3983694c7bfe19ea477fb70a330cd7214574438fb2f27
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. This suggests a phishing attempt where users are tricked into clicking the link, likely leading to further malicious content 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.ru/pify?keyword=yulgang+global+mobile+guide In PDF document text
    • http://gafusib.iglesiapiedradesantuario.com/uploads/1/3/1/4/131407668/4b0c381d2109.pdfIn PDF document text
    • http://files.room15ccc.com/uploads/1/3/1/4/131452861/gaxibavi.pdfIn PDF document text
    • http://files.daydreambakery.com/uploads/1/3/1/4/131408432/796f9f6.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/1/0429/6520/5141/files/59503480634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7442/8829/files/introductory_chemistry_nivaldo_tro_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1287/4662/files/algebra_1_exponential_functions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/32643645466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/farawikuruvadagodabomaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/zarakajomapobivetototudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/accellion_plugin_for_outlook_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2279/files/90227526731.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 2

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_off00006bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF0 4972 bytes
SHA-256: f80535eeb076016ebe45a25efd40f4759e03c2102a7d36c622c89be8113bebdd
font_01_sfnt_off00007cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC6 9680 bytes
SHA-256: 9fb45af9e57870e62cf29b2c70b25a024d601a3a23e637151dacb0c7f130683d

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