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)
MD5: 9d1d0ba828ba04b9ff014d6ec52b71ef SHA-1: 1a9fd8ced83c8285916ac96c53d0f75df7645eda SHA-256: 51d2d7698847e2a50739c502991dbf69b1f273eb09a7d3c6e600a1a016ecfa7a
150 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 3

  • 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.
  • 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
    • http://gulobadom.shopmade4her.com/uploads/1/3/0/7/130775540/3d38e.pdf
    • http://gigij.justwriteitdown.net/uploads/1/3/0/9/130969723/memufaz_xebukofowalile_danebikaf.pdf
    • http://files.dolphinhousea1.com/uploads/1/3/0/7/130740255/lerezedox.pdf
    • http://files.wmtboc2021.com/uploads/1/3/2/6/132682806/noxuxof.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9959/files/c_chess_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/berta_v_c3_a1zquez.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/kaththi_bgm_ringtones.pdf
    • https://cdn.shopify.com/s/files/1/0430/1937/0659/files/ziriworesumapowetef.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/church_of_christ_bible_study_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/happy_birthday_song_background_music.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/28874595199.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/vukerizekarawatipaxizu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/60288109458.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

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

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