Malicious PDF — malware analysis report

Static analysis result for SHA-256 657e8605b31cf12c…

MALICIOUS

PDF

45.3 KB Created: 2020-08-25 08:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b6a22c20841b2ea418654096be5f8bc2 SHA-1: cd811903653b5782ab8870d7d7da45440b559a0d SHA-256: 657e8605b31cf12cf033880e1c36db6793a09f6d86cc87e6b96a6410ca6604ff
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a link farm, identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a phishing or scam attempt.

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.cc/pify?keyword=splash+screen+android+xamarin+example In PDF document text
    • http://files.katrinarecoveryquilts.org/uploads/1/3/2/6/132681758/9465931.pdfIn PDF document text
    • http://files.gogovernors.com/uploads/1/3/1/4/131406762/6528224.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/1/0437/4819/6503/files/abstract_reasoning_practice_test_with_explanation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9455/6320/files/98705585376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/7871078368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4073/3341/files/vlc_media_player_for_linux_fedora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/classical_dance_forms_of_the_world.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/8669/4824/files/catalase_assay_protocol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/larsen_s_human_embryology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6502/4416/files/pemafuxazamewug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8508/6364/files/35276543635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9167/9648/files/eu4_revolutionary_flags.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_off00006569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6569 5484 bytes
SHA-256: b3fc9f4a34eba6263295132ca1afe2b1b68f2f26f918643b9b7754921c7169f0
font_01_sfnt_off000077da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DA 15472 bytes
SHA-256: 31ee79322c7405aa5918b5ec4be7ee708f9985d5fea01b51ad716d78c0b369b0

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