Malicious PDF — malware analysis report

Static analysis result for SHA-256 43f0e95e23e04b9e…

MALICIOUS

PDF

41.2 KB Created: 2020-07-30 14:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4606e7ea259c3457a3f6f49a205c2a48 SHA-1: 5f83cb8803070f92f7acae65ec0b3dcf0e7eadd0 SHA-256: 43f0e95e23e04b9ee4fc36828800af1df1c94548dc061701fd4ec32232ce0400
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to a children's book, suggesting a social engineering tactic. The presence of a link farm further supports the intent to distribute malicious content or redirect users to compromised sites.

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=the+incredible+journey+penguin+readers+level+3+pdf In PDF document text
    • http://files.gmskiclub.org/uploads/1/3/1/0/131070207/64076d0.pdfIn PDF document text
    • http://files.konsultservices.com/uploads/1/3/1/8/131872087/nulanudifo.pdfIn PDF document text
    • http://files.norcalsmartvestorpro.com/uploads/1/3/2/7/132710655/96f0fa3.pdfIn PDF document text
    • http://files.stephaniemorianner.com/uploads/1/3/1/3/131379540/kufov.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/1/0436/7430/4662/files/94522634249.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0697/5382/files/bofazalexuwitodiduvatilek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4673/9866/files/75990375613.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7005/4805/files/lipamugujef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2638/0960/files/8735719952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/70914445688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/3190644788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2191/0694/files/61391400353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/majuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7730/2427/files/xibitidulawawapepivafuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/gogoxejilisopiwopika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0809/7445/files/24175140840.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_off000061b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 5708 bytes
SHA-256: 06419d72aab74d6435bcdba53cc7af0b6a5199a256fe23b379c42242194b9b40
font_01_sfnt_off00007518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7518 9972 bytes
SHA-256: af8688e9f34f66106222e09ff86ba3e56448b0bd3ccac301ed71d01ac6161403

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