Malicious PDF — malware analysis report

Static analysis result for SHA-256 135133401ba2bede…

MALICIOUS

PDF

39.8 KB Created: 2020-08-28 05:06:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed2d904fdcac32a344338014c5005281 SHA-1: 2c6766c2549f2e40c992718c920a5c0ebe7e03f4 SHA-256: 135133401ba2bedec1638b2cb5528f726d54db3801df83feab3b84e88786eced
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised with text related to writing a diary entry. This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment. The ML classifier strongly indicates maliciousness, and the presence of numerous external links points to a link farm or redirector strategy.

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=how+to+write+a+diary+entry In PDF document text
    • http://files.sapritalia.com/uploads/1/3/2/7/132740435/96ae52b.pdfIn PDF document text
    • http://files.precisionimprint.net/uploads/1/3/0/8/130814680/potaki-topibatalaxafem.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/1/0432/1761/7057/files/domizigedaguzus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6599/9511/files/46261145766.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/fewopokexi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/rosakisusexamubeminir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0455/5482/7429/files/anglo_saxon_literature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0631/5943/files/hotmail_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/0555/1271/files/92632154206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/cambridge_test_for_young_learners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1773/8152/files/41995684356.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_off00006130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 4764 bytes
SHA-256: 3f10b53e0fe104c1d0b696852b920c9a092acfcf17c50150a89ed40a0c0ae541
font_01_sfnt_off0000717e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717E 9820 bytes
SHA-256: ec64295e814be849d69237bba3be1545b62d614c1de415ef7401da1506f516bd

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