Malicious PDF — malware analysis report

Static analysis result for SHA-256 1adf04b450b6ce91…

MALICIOUS

PDF

33.9 KB Created: 2020-08-21 14:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b845285b28252159094258aa8f7c7e8 SHA-1: 352c83491523d01d0af05e79520469508c21afae SHA-256: 1adf04b450b6ce919faa1ca0ee8b16f97e06e4035d2a763fda34acbec3049013
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and URLs, including the primary redirector URL. The primary purpose appears to be to lure users to malicious content through a chain of redirects.

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=alfani+shoes+size+guide In PDF document text
    • http://files.mayusaeki.com/uploads/1/3/1/4/131407632/564870.pdfIn PDF document text
    • http://files.mycpdc.com/uploads/1/3/0/7/130739814/8671139.pdfIn PDF document text
    • http://files.straightoutscribes.com/uploads/1/3/0/7/130775737/d76efb1276dd882.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/1/0437/3417/1797/files/jazoferalexivupibitolases.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8511/0177/files/16532531721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/82836897239.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0682/8441/files/89946425562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/11877424462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/24419227098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/87917363004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5448/1056/files/wuzinulisekagimig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9764/4449/files/aviary_app_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5777/3725/files/27515776111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8748/7385/files/zuwalaxomuvobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9870/files/child_support_guidelines_in_louisiana.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 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_off0000486e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x486E 5112 bytes
SHA-256: db2a717c54c245415dc435fa2f59f26df07c58411c47c3cbe0062e8d108fa081
font_01_sfnt_off000059d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D9 9740 bytes
SHA-256: e9f9e748d26b5a051b48f9734966ec5e8dae414fbd5df37725b799464ab90374

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