Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5955c31199939e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-29 19:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d92d160d448a7df884a3a6fe31a2ac0 SHA-1: 6a0f9e415cf9cafdba5b529852d5cd365ae42c9d SHA-256: 7b5955c31199939ea29731427aefb000baaa5d197c7e2b9041b267853ffb0076
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 URL, indicating an attempt to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the heuristic firings suggest a phishing or scam attempt disguised as a free download.

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=carson+horizontal+bookcase+threshold In 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/1/0437/1087/3765/files/ielts_academic_reading_practice_test_ielts_fever.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/fake_company_names_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/77558366424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6483/5737/files/95291185660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8071/8238/files/living_with_hipstergirl_and_gamergirl_porn.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_946623de2c8d4ae1bfa3c9e658859ce4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_9c5f60f4ae5f4bd284098d999c42e049.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0fdb6d_d1539213dab7443692a90315d41907fb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d4596a7deb9a4e2b80d4de45785102e6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/05900a_b171d4be262f4580b1669cef4db5a0ab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/blockchain_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/82793248201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/social_media_advertising_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3364/7509/files/bepijofijunusurowatosix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/arrival_full_movie_download_moviescounter.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00004806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4806 5184 bytes
SHA-256: a3f6cc6393737e77527880ea305dc6540268470e790ce1f74067cf557f62b591
font_01_sfnt_off0000599d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599D 9900 bytes
SHA-256: 34182427e5da32e08b6205bf9a688578d5ae3ab0f2fd38d20431fac584a35fc7
font_02_sfnt_off00007bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB8 16384 bytes
SHA-256: a8f82ce1cdc57d6cf73caeb35ba0a534b8f114798d4dfc5d6ed82df03316e49d

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