Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43923f39f10bafa…

MALICIOUS

PDF

43.9 KB Created: 2020-09-02 19:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17c947e0701c1474597704e0cac154a1 SHA-1: 2baad80d6af220545db8f5de8d3762cd460b22f0 SHA-256: c43923f39f10bafa0e526acbd11770391be9ce0ca4f8588d07c97376633d695c
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The presence of numerous links suggests a link farm or redirection strategy to distribute malicious content.

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/wix?keyword=fishing+games+free++for+pc 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/a48928_52cbfa7792634fce9d95ecb9bc95ec87.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8127dd_5f36f13d41304f3bbc13c1e9774e9853.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/badafb_8c16af416c934772955d99de6f062ea4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6da380_8a3ddf6f718d4f64b936df96cbfafb5e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ea9bdf_b7bfc586f67a4be3ae41a6fb7c0ab315.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e8a828d5db344b34b4a16364c9714aa7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/85614750896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3231/9899/files/telugu_movies_in_nj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/assignment_writing_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8812/4573/files/bahnschrift_condensed_bold_font.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_02c88df83c6b4dfdad4269f09ee2c830.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2cc151931659490da406f5a076073cb9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ca933f4e887c48e6b0edae9a96fa7667.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8acad3_b6dca0efa3cb4fee89b41471a5dc2d8b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a0d0e11fb6cf43d29792f026b4d63c22.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
🗂 Part of campaign: sunnibunni.com 3 samples

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_off00006d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D14 5352 bytes
SHA-256: 167ddc47051729dc97400f3d6dbd4e22e1951910adab79570e184878c4a2719d
font_01_sfnt_off00007f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F26 10212 bytes
SHA-256: d47491969a842f49f644083b6bc445b6f3bcd094fc00be4d166b52136ff3449e

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