Malicious PDF — malware analysis report

Static analysis result for SHA-256 195831da4dbc7cfc…

MALICIOUS

PDF

33.2 KB Created: 2020-08-26 07:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b0f83707c95ba10288914c6e4a9fcb0 SHA-1: e49dcb76554bd57b9dc8cc831b9f5ff8972abcf1 SHA-256: 195831da4dbc7cfc1a1141711710203bc71c5a6fb24c84b5cfa50d25775a5d31
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or to download further malware.

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.com/pify?keyword=stop+milk+sale+fs17 In PDF document text
    • http://files.victoryhinesville.com/uploads/1/3/0/7/130739618/pakexab-pudurivelixa.pdfIn PDF document text
    • http://gibozudun.monitor-io.com/uploads/1/3/1/3/131398140/066b316da.pdfIn PDF document text
    • http://files.dianavgustafson.com/uploads/1/3/2/6/132681556/cbb2f1dfa.pdfIn PDF document text
    • http://files.cofhhe.org/uploads/1/3/1/0/131071037/vibesuni.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/1/0434/8785/4749/files/42019546264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/91587404352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0967/9265/files/flannelette_sheets_queen_target.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4190/5057/files/thyroid_diet_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/70665627511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4922/0256/files/sublime_text_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/nusapipuvaduzuvibeza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/relationship_between_sociology_and_anthropology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/mizutexajimoriwuvexudiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/40822665316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/23994583180.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 5

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_off000045b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45B5 5248 bytes
SHA-256: c70ee9c9ebbfa504527866d99030f0d9290028b2655d1be1d2f316000cba0753
font_01_sfnt_off00005789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5789 9580 bytes
SHA-256: 88a41ec2c901389f1f72d7f780bc9b241ab22542595747c22fc0ccb1006f33bb

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