Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1b7845192f9886…

MALICIOUS

PDF

48.2 KB Created: 2020-08-21 07:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c8e335a65c9f863d7b4fa25f93666e99 SHA-1: b8e01d9eb75ed6259c328a28ecdcd33b13a82430 SHA-256: 3b1b7845192f9886365b7f9cad39ccd50fda6378214b3570c359f3efc9f1a07d
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary link identified as a malicious redirector. This suggests the document is designed to lure users to malicious websites. The presence of a large link farm further supports this, indicating an attempt to obscure the true destination or distribute malicious content through multiple paths. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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=basil+plant+care+information In PDF document text
    • http://files.mysacredgrounds.com/uploads/1/3/1/6/131606072/rabikuzon-tidikejo-gogib.pdfIn PDF document text
    • http://mozevo.tucksdoghouse.com/uploads/1/3/0/8/130874049/d21a647.pdfIn PDF document text
    • http://files.vedacollective.com/uploads/1/3/0/9/130968996/4242940.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/1/0440/1351/9006/files/elf_hydrating_sheet_mask_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9156/6493/files/crosley_refrigerator_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/25663717308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/write_to_a_file_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/gasavavoraveburodozetabep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3123/0624/files/kronos_time_clock_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3073/1173/files/asynchronous_motor_control.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2155/7150/files/barbulescu_contra_romaniei.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/free_family_feud_template_google_slides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0708/1622/files/jolilarisijapilo.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 3

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_off00007165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7165 5000 bytes
SHA-256: b842da83c0ef1db3d52240e67f97f404287983268c6f623e7b56ce01c8ac7f0c
font_01_sfnt_off00008234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8234 10468 bytes
SHA-256: c5967655fbff034ece8fed108e440cc11f2e71e55b6df0c3f0d35ab2c874bf86
font_02_sfnt_off0000a605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA605 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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