Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da6ea720de63a3d…

MALICIOUS

PDF

38.8 KB Created: 2020-08-17 04:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0bd6455e156b3a68c22e2d7378446ae2 SHA-1: 4d53f0235600a89f28a7a18f91ed314763798c3d SHA-256: 6da6ea720de63a3d1ae0b619f92db18867f11726d0b3e1397a4dc33975727bab
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a primary link identified as a malicious redirector. This redirector likely leads to a phishing or malware distribution site, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The document body, though partially corrupted, contains text suggesting a lure for 'Alfabeto e numeros em ingles pdf', likely a pretext for the malicious link.

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=alfabeto+e+numeros+em+ingles+pdf In PDF document text
    • http://giwado.erinsmithlac.com/uploads/1/3/2/8/132814930/610126.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/1/0433/9499/0231/files/jilep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/34277294661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/osrs_spiked_boots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0036/9049/files/kirebode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7197/7110/files/deaf_like_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/24496691712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3321/5654/files/dimimoforim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4076/7132/files/bosch_aquastop_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/42153481521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0766/2490/files/anlage_kind_2020_ausfllbar.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 1

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_off00005983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5983 5492 bytes
SHA-256: 5d18dc490c0033399fc6de7ae8ca0f149bc13cd53f31ee773fedfd8f0dbd032f
font_01_sfnt_off00006c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C15 10148 bytes
SHA-256: 029206bdd709b6e01200ba92a4aef07ec4b492c75bb553dc64effbe43b77822d

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