Malicious PDF — malware analysis report

Static analysis result for SHA-256 1898add5de75f0e0…

MALICIOUS

PDF

41.4 KB Created: 2020-08-04 00:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 73e0114f7c663509c3fefa1a7b1dd862 SHA-1: 5ac25f2d74e416edf18658767d02f8bea9db357c SHA-256: 1898add5de75f0e00c5e34cf4195e07442cb6a6f20db58058b96c297b58c258c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector infrastructure designed to obscure the final destination. The document body and heuristics indicate a lure for 'Acrobat reader pdf files free download', suggesting a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=acrobat+reader+pdf+files+free+download In PDF document text
    • http://files.inspiredartexhibition.com/uploads/1/3/1/4/131437330/ruzulebekixonipis.pdfIn PDF document text
    • http://files.heritagepumps.com/uploads/1/3/1/3/131397973/c0f0be5edb.pdfIn PDF document text
    • http://files.chest-messages.com/uploads/1/3/1/4/131482931/70ce8.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/1/0437/2329/2822/files/56974915912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/zidukudopigol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/mubavixadobav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lojuxefututa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3499/2025/files/apache_hadoop_ecosystem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3708/8154/files/accounting_information_systems_romney_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51031200676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/fatejetivenir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5778/2694/files/73346334150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/pazusebeneb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4330/7175/files/cbse_class_10_light_reflection_and_refraction_notes.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: heritagepumps.com 3 samples

Related samples 7

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_off00006321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6321 5372 bytes
SHA-256: babd4af7ab0e4e5c14dcd58919b4ae07cc78fecd0fdf0668ec311480efee162a
font_01_sfnt_off00007581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7581 10304 bytes
SHA-256: 8eee2ad69b0bd9e102f1d7faaf88f3df578d8efd7895ffdbd27b2f99b28e1b88

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