Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d17f4321140ee2…

MALICIOUS

PDF

45.5 KB Created: 2020-09-12 22:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b4b2ccaf85578e1f7f1e882374f1280a SHA-1: d224e7c66e902ed8d750c00b1f5fdfbc33e5e945 SHA-256: 43d17f4321140ee2a50d2c20f11dbb68c9ca9830a61ad56627021ae65533e4a4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm designed to manipulate search engine results. One prominent link, 'https://ttraff.link/wix?keyword=instruction+manual+for+apple+ipad+4', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to an iPad manual, suggesting a lure to entice users to click the malicious link. The ML classifier strongly indicates malicious intent.

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.link/wix?keyword=instruction+manual+for+apple+ipad+4 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/4c3ae3_425e4d6318734e07b769a8dd8396e769.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fd7405_5f4c6dd958cc4daaa8043e06a8949505.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/704f6c_758ebd6f8a694f07ae1f3578a1f99cfc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f3ecbe_1dba033ed7e945b1a512099b68fd70f8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/cornell_notes_template_no_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2953/files/27638517895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4916/5734/files/54777567808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/wusowobexaxomuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/77822971268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6112/4008/files/gitex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6176/2455/files/purus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/6973/5847/files/install_adb_windows_android_studio.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 6

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_off00005f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F28 3724 bytes
SHA-256: 0bc2187513754c209a1ff1b79f120b31e782b370bd3c40d674ca37d1cde5bce0
font_01_sfnt_off00006c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C65 5328 bytes
SHA-256: ffda89373a4263b7539fa9373714d73f39992d06f6b8c7594f3191bebd10c1d7
font_02_sfnt_off00007e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6F 13376 bytes
SHA-256: 5b9acf1030944cb86a5ccb345d37e17038a1cfefba64999f83afb15783752f5e

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