Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdb1a9d8a7e94f5…

MALICIOUS

PDF

51.3 KB Created: 2020-08-06 19:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e284a1cf1506a3c8625eee153b765bbb SHA-1: a107f536828dc55f71a6791cd64bcdb41aeea2da SHA-256: 8bdb1a9d8a7e94f5297533c3078e8f17d11c67a1f94825a486955cbb187a42bf
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'piano books pdf'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to harmful content. The ML classifier also flagged this PDF with high confidence.

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=beginning+piano+books+pdf In PDF document text
    • http://files.highspringsmuseum.org/uploads/1/3/2/6/132681617/ae3998c.pdfIn PDF document text
    • http://wukanip.visionillustration.com/uploads/1/3/1/4/131453850/bupelunur.pdfIn PDF document text
    • http://files.midnightoilscompany.com/uploads/1/3/1/0/131070711/2209653.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0319/8116/files/64839625996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/rozutuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/tidebemolidevemonaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8127/files/31732116238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3716/9576/files/bevakawifupege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3332/9817/files/gepedukuxosariwevapufuku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/dexidaropujurefirazodam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4710/5191/files/1987_suzuki_quadrunner_250_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5573/4166/files/96139960397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7052/1495/files/zogalojimi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/65932445518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/midland_75-_822.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E36 5040 bytes
SHA-256: a2bee4a97f92aee8debff083038ef337a3cdce657b4f415711417a0ffb1d499c
font_01_sfnt_off00008f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 10136 bytes
SHA-256: 23261960f6cc39dff2af37569c291f61cf5a2112e8fe92b3749236f5848ed3d1
font_02_sfnt_off0000b21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB21E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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