Malicious PDF — malware analysis report

Static analysis result for SHA-256 e775520c0599bc28…

MALICIOUS

PDF

39.4 KB Created: 2020-08-17 12:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4b9f332b36f16e5200b1fb5716cfaaf SHA-1: 7e8efb9909edd1bf9c5f285d24fee92e423e4215 SHA-256: e775520c0599bc28b446955b64539e4a4d5a73efb7a5049d333c654cd87fe838
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link to 'ttraff.com', which is known malicious infrastructure. The document body, though malformed, contains the text 'Certificate of appreciation template canva' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=certificate+of+appreciation+template+canva
    • http://files.strawberryflats.com/uploads/1/3/2/7/132710795/lavibejepejiza_jorikinulap_wiboka.pdf
    • http://wekotigid.katarinaclairecorner.com/uploads/1/3/1/4/131437502/tofoxi.pdf
    • http://lekag.tanimaherphotographs.com/uploads/1/3/0/8/130813453/zelaf-nazenoje-refar.pdf
    • http://files.downtoearth-solutions.com/uploads/1/3/2/7/132712011/41893ad64.pdf
    • http://files.petpigeducation.com/uploads/1/3/2/6/132695258/7963168.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/88296974678.pdf
    • https://cdn.shopify.com/s/files/1/0437/8342/2109/files/engineering_drawing_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/3705/5393/files/movimiento_circular_uniformemente_variado.pdf
    • https://cdn.shopify.com/s/files/1/0434/3873/5517/files/jigixoxajijamafikinizuniv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/voxidezoviwusibez.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/7129321787.pdf
    • https://cdn.shopify.com/s/files/1/0431/5774/9917/files/ameloblastoma_pathogenesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/edit_text_freeware.pdf
    • https://cdn.shopify.com/s/files/1/0433/3617/1688/files/atualidades_concursos.pdf
    • https://cdn.shopify.com/s/files/1/0429/7352/8213/files/pagutosoton.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_off00005e71.bin
07858d39190cf32d328321a5a2034db4624d4fda19fbd63d86bff40f4156689f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E71 4948 bytes
font_01_sfnt_off00006f33.bin
2a4515903b059198a4c9a28f00441ca0c73f5b89e87c75532983a8aa0fefadf4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 9792 bytes