Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d2d7698847e2a5…

MALICIOUS

PDF

41.4 KB Created: 2020-08-18 13:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d1d0ba828ba04b9ff014d6ec52b71ef SHA-1: 1a9fd8ced83c8285916ac96c53d0f75df7645eda SHA-256: 51d2d7698847e2a50739c502991dbf69b1f273eb09a7d3c6e600a1a016ecfa7a
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The embedded link 'https://ttraff.cc/pify?keyword=bpi+bizlink+application+form' is the primary indicator of malicious intent, likely leading to a phishing or malware download site. The document body, though heavily obfuscated, contains text suggesting it is an application form, reinforcing the 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=bpi+bizlink+application+form In PDF document text
    • http://gulobadom.shopmade4her.com/uploads/1/3/0/7/130775540/3d38e.pdfIn PDF document text
    • http://gigij.justwriteitdown.net/uploads/1/3/0/9/130969723/memufaz_xebukofowalile_danebikaf.pdfIn PDF document text
    • http://files.dolphinhousea1.com/uploads/1/3/0/7/130740255/lerezedox.pdfIn PDF document text
    • http://files.wmtboc2021.com/uploads/1/3/2/6/132682806/noxuxof.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/1/0434/5180/9959/files/c_chess_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/berta_v_c3_a1zquez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/kaththi_bgm_ringtones.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/ziriworesumapowetef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/church_of_christ_bible_study_lessons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/happy_birthday_song_background_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/28874595199.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/vukerizekarawatipaxizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/60288109458.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: dolphinhousea1.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6300 5288 bytes
SHA-256: 8e0546e7fb6678a22822347f5994e293fc799a80d080dec71146b87ea1c4fc58
font_01_sfnt_off000074e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E0 10440 bytes
SHA-256: 631f3d8a00b9728f088dc8cf6a0fac384d486918164a082384e7e3a837224e7f