Malicious PDF — malware analysis report

Static analysis result for SHA-256 805be9b8bb7a3fb6…

MALICIOUS

PDF

187.4 KB Created: 2020-08-07 22:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d7c681f92b2bcbd11ebccfb6f652099 SHA-1: f965ec08b61805b1beb2465e6984bab0a38e5361 SHA-256: 805be9b8bb7a3fb6d24b78305f2b524a3534e4e6668aa426afdc94ebe16664da
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=brasilien+karte+pdf'. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for further malicious activity.

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.
  • 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=brasilien+karte+pdf
    • http://files.rockymountainpaintingcompany.com/uploads/1/3/2/8/132814371/8fcf4b196352.pdf
    • http://files.janelincove.com/uploads/1/3/1/4/131453387/mifezirekidapar.pdf
    • http://files.eaglesobx.org/uploads/1/3/2/8/132815118/7698546.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0742/7238/files/vuvub.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/girokupoteki.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/90120020408.pdf
    • https://cdn.shopify.com/s/files/1/0434/6445/8405/files/traditional_and_authentic_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tosinumemelijigejidab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3434/files/php_aes_encryption.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/chemistry_haloalkanes_and_haloarenes_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/vmware_fusion_key.pdf
    • https://cdn.shopify.com/s/files/1/0433/9338/4599/files/sageworozonunuxoni.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/77363931764.pdf
    • https://cdn.shopify.com/s/files/1/0440/1342/0702/files/towugifoli.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a393.bin
55ec48bee0fef26884671accdd57595af9a744a55274a985d5f7ffc5c207f927
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A393 5148 bytes
font_01_sfnt_off0002b529.bin
2b2a9d9782ef3297c59f949eb17e6e2e676d794ed9548b4ba2064007348b547f
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B529 12896 bytes